Rom, the Vacuous Spider

General Info
hp.jpg blood_echoes.jpg Location Drops
5058 36300 Moonside Lake Kin Coldblood (12)
7263 10975 Lower Pthumeru Chalice Lower Pthumeru Root Chalice
physical_DEF.jpg VS_blunt.jpg VS_thrust.jpg --
130 130 130 --
blood_DEF.jpg arcane_DEF.jpg fire_atk.jpg bolt_DEF.jpg
130 80 72 45
slow_poison_RES.jpg rapid_poison_RES.jpg VS_beasts.jpg VS_kin.jpg
999 999 No Yes

Rom, the Vacuous Spider (白痴の蜘蛛ロマ Hakuchi no kumo Roma lit. "Roma, the Retarded/Stupid Spider") is a Great One Boss in Bloodborne.

Rom, the Vacuous Spider Information



  • Moonside Lake, accessed from the Lunarium in Byrgenwerth College.
  • She can also be found in Lower Pthumeru Chalice.
  • She can also be found in Phtumeru Ihyll Root Chalice: glyph 4j4wp4y8 (all offering, 3rd layer, so it's possible to obtain an abyssal gem, the privacy of the chalice is closed). This is very strange: I've played an enormous number of chalices, but this is my first time with her in a Root. She drops nourishing gems.




Combat Information

  • Shaman Bone Blades are somewhat effective when used on her spiderlings since it will make the rest of the spiderlings and sometimes Rom herself target the turned spiderling.
  • Minor weakness to Arcane and Fire. Very weak to Bolt.
  • Arcane Damage Reduction Attire such as the Tomb Prospectors' or greater are greatly helpful against Rom's Arcane attacks.
  • When battling alone against Rom and her many spiders, kill the lesser enemies carefully and only attack with melee attacks when there is no danger.
  • Hits to the body deal more damage than hits to the head.
  • If you're planning to summon help, keep in mind that the co-operators will be blocked by the fog until the beckoner has started the fight (i.e. the boss's health bar shows in your screen). Even during the first attempt.
  • Rom takes damage during teleportation, so use strong attacks (R2) for additional damage.
  • Boss teleports 2 times after taking enough damage, also kill the smaller spiders first as they have the ability to catch you in a stunlock that will kill you most of the time. After the first teleporting segment, the boss will start using magic like Arcane meteors from raining down from above and from the ground, run toward the boss to avoid the meteor like one and back off the boss to avoid the ones coming from the ground. At the last stage the boss will start doing moves that can hurt your character, also can explode.
  • Run towards the boss with a left slant, and the ice attack will run along side you, missing completely. An easy strategy is to bait the ice attack, run towards the boss and to the left, hit once, run away, and repeat.
  • If you're playing in Co-op, then take a flank each when you come to attack Rom directly and let loose with fire and bolt attacks. If Rom starts to turn and track one of you, the boss' rear is just as weak as the sides. It is only the head that has the high physical resistance.


Attack Name Attack Description & Counter
Ranged Ice Barrage Faces upwards and rains down multiple ice blocks on the player. Run and dodge quickly to avoid these. (Only at <66% HP)
Melee Explosion Points tail in air and wind swirls around it and explodes around her hitting the player in melee range. Move away to avoid this. (Only at <66% HP)
Upward Ice Barrage The boss will curl up and roll on her back, causing giant bricks of ice to come from the water. Evade this attack by running away. You can see exactly where an ice brick will come up, as several blue rings will appear on the water. (Only at <66% HP)
Body Slam Attack The boss will shake her head and her 'tail' once you stand close to it. This attack might be difficult to evade, but if you keep enough distance from Rom's head and 'tail', you can evade the attack more easily. (Only at <33% HP)
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Strategy 1 (Flamesprayer)

  1. Bring the Flamesprayer.
  2. Buff it with Bone Marrow Ash.
  3. Bring a blunt weapon for the small spiders, such as the Tonitrus.
  4. Run towards boss, kill spiders, then get right on the left side on its head and spam Flamesprayer attack while walking left.
  5. If she teleports, repeat above being mindful of her AOE.


Strategy 2 (Strength Weapons)

  • Items To Bring: Bolt Paper.
  • Suggested Weapon: Ludwig's Holy Blade (Obtained by finding the Radiant Sword Hunter Badge, located at the end of the optional path up the elevator at Cathedral Ward. The door will open once the Blood-starved Beast has been killed.)
  • Tonitrus leveled to +5 or above is an excellent weapon for this fight. The minion spiders can be killed in one hit when self buffed and a charge attack against Rom with it self buffed can take off ~700hp (recorded with +6 Tonitrus.)
  • Benefits of Ludwig's Holy Blade: The weapon transformation is essentially a ultra greatsword- but the R2 charge attack packs immense damage and the standard mode is aggressive and fast.

Phase One: Rom is rather helpless in round one, summoning a group of spiders who can easily take a third of your health out or one shot you if they flank your back. Never turn your back to the spiders. The spiders can jump at you and land on their heads, exposing their backsides. Hitting them when they're standing on their heads is an instant kill. Flanking spiders is a one to two hit kill. Taking a spider from the front is somewhat safe, but their heads act as a physical guard. A three hit combo will allow two hits to chip their 'masks' and the third strike will deal the final blow. (A moveset to note: If a spider jumps to the side, it will follow up with a jump forward. If spiders raise their legs, back up and avoid their continuous combo) When most of the spiders are dispatched they'll slowly mimic the bodily movements of Rom, allowing you to flank them easily as they panic in their slow movement. When the spiders are dead, pop a bolt paper and switch to greatsword mode. Charge the R2 attack when you have a good shot at her side, and yes you'll have to lead the shot some. Proceed to keep wailing on the boss until she begins to glow and spin, when she does this you can snap in one to two shots before she completely disappears. Pan your camera until you see her drop in with her spiders again- but this time you need to run to it asap.

Phase Two: Rom will have three new tricks up her sleeve- a pair of arcane magic attacks and an area of effect detonation. The first attack is where she will hail crystal/ice chunks at you from a diagonal, aerial angle. This is indicated when she rears up on her hind legs. The best way to avoid this is to watch Rom and dodge once to the left then once to the right. In Phase 3, dodge three times (alternating sides). The second attack is indicated by an eccentric rolling around motion, where the same hunks of ice/crystal will rise from the ground wherever the ground turns blue. This can be easily avoided if you patrol the outside 'border' of the spider formation. You must dispatch the spiders as you have before while calmly pacing your walking around the ground shards. The aerial volley occurs mostly when you're too far away- but it happens at random in close range. The ground volley rises frequently when dispatching the spiders, but stay calm. Three hit the spiders safely while keeping an eye on the boss- don't take the risk of flanking spiders and wait for them to headbutt for free kills. When the spiders are dispatched and you close in, be wary of its area of effect explosion (similar to Paarll but smaller). Use a Bolt Paper and lead a charged R2 into her side. Spam her with light attack with either mode of the weapon you see fit until she disappears again.

Phase 3: The same rules apply- only Rom will now attempt to charge you or flail around in an attempt to stunlock you for the spiders to follow up on. Rinse and repeat, the Bolt Paper is the saving grace.

Basically, just twat the big spider

Strategy 3 (Tonitrus Strategy)

The Tonitrus is extremely effective against the minion spiders and generally kills them in one hit from the side.

  1. Phase 1 spend most of your time avoiding the minions and chipping out their numbers. One they are all dead focus back on Rom. Self-buff the tonitrus and keep swining, be sure to re-apply the buff every few hits. You should get her to about half health at least this way (I was able to get her to about 25% during phase 1). As Rom begins to fade, be sure to keep swinging to deal as much damage as possible, it is likely you can kill Rom on phase 1 with this strategy depending on blood gems and stat scaling.
  2. Phase 2 the number of spider minions doubles. Be very careful as they do an arcing headbutt attack as it does massive damage, but this gives you free kills on the minions as they stun themselves. Continue to chip away at the minions but keep moving as now Rom is on the aggressive. as long as you keep circling around Rom her arcane boulder missiles shouldn't hit you, but they land pretty close. Once you've cleared out enough minions approach Rom but be careful, for she will do an AoE attack that surrounds her. If you killed all of the minions she will spam this attack. There is a small window between each attack that you have to kill her so watch it for a little bit to figure the timing out and go in for the kill.


Strategy 4 (Old Hunter Bone/ Mobility Strategy)

If you have stamina cost-reduction gems on your weapons (preferably) and have the Old Hunter Bone this will be one of the possible go to strategies. 1st Note: Bring a decent amount of Blood Vials and stock up on quicksilver bullets, Blood of Arianna is recommended but not necessary (just to supplement your stamina regen). 2nd Note: For those who use the Old Hunter Bone, do know that the first note greatly applies to you because it requires a taxing amount of quicksilver bullets to use (6 every cast), so you will most likely need to use your own health to supplement your bullet stock which is why the first note exists. Using the Old Hunter Bone allows you to quick step and bypass most of the spiders that act as her defensive wall by eliminating time between rolls and dashes, because you can bypass this wall with great expense to stamina, you have to make sure you have enough time to regen enough stamina to land a charged heavy attack on Rom, preferably with Ludwig's Holy Blade or the Kirkhammer. Rinse and repeat.

  • Pros: You don't really take much damage if you know the ins and outs of your combos and ranges of these weapons since the spiders move relatively slowly in strafe patterns. Relatively quick, probably a good method to use in NG+ if you are trying to redo the fight at the start when Rom is just static on the first encounter. Rom's arcane barrages will not be able to keep up with you ever (unless you are using vials and emergency quicksilver bullet transfusions immediately after each other). You don't have to waste Paper consumables, but you can if you want to make the process faster than need be.
  • Cons: The mobs of spiders will stack and convene in areas where Rom teleports at over time if you initiate all stages. I've seen it where spiders leap directly to Rom once she spawns the second and even third rounds. They will swarm you if you cannot pull this method off quick enough.


Strategy 5 (Prevent her from attacking through the whole battle)

Items To Bring: Blunt weapon, Bolt Paper (not necessary, but helps a lot)

  • Phase One: Note that Rom can in fact teleport only one single time or not even once if you manage to interrupt her teleport during any attempt. To do so you need to time correctly a R2 charged atack using a blunt weapon. Confirmed with the Hunter Axe on "Halberd mode", but it most likely works with another heavy weapons like Kirkhammer or Logarius' Wheel. By doing so it's possible to prevent her from summoning a whole wave of spiders and to skip the second and/or the third "atack phase" of the boss, making the fight a lot easier. Although sometimes she summons two waves at once when teleporting after being interrupted, it is possible to break her teleport several times in a row, even preventing her from atacking during the whole battle if you start breaking her teleports from the beginning. As demonstrated on a video at the end of this page, I missed only her last teleport attempt (I didn't manage my stamina properly at the end) while fighting her once again on the Lower Pthumeru Chalice (I remade the Chalice to show the basics of the strategy since it's the fastest way to have a rematch with her).
  • No phase two nor three if you manage to break all her teleports in a row.


Strategy 6 (Ranged Bowblade & Monocular)

Items To Bring: Simon's Bowblade, Blood Vials (for Blood Bullet creation), Monocular

  • In all phases the ideal plan is to maneuver to the side of Rom, lock on, and shoot arrows into Rom's side. This will progressively be harder to perform (mini spiders often make locking onto Rom hard). During the later stages, when there are too many spiders to get close you may: 1. Rush in, lock onto Rom, Backstep away and-or to the sides to keep the target lock engaged while shooting arrows (or) 2. Face Rom head on from a distance within a Bowblade's arrow range. Next, use the Monocular to aim just above Rom's head with arrows from your Simon's Bowblade (you can also shoot Rom's belly head on when Rom stands up to do Arcane attacks). This should also work with Monocular + Firearm as well. Keep in mind the mini spiders will be on the move and jump attacking you. Stay alert while using the monocular and dodge mini spider attacks. When using the monocular you can not run, if you see Rom charging up to do an Arcane attack - exit the monocular view and run or roll do dodge these projected attacks.


   Strategy 7 (Beasthood Buildup)

 Items To Bring: Any quick weapon ( Preferably the Saw Cleaver or Spear), Bolt Paper, Beast Blood Pellet, Armor that gives the highest amount of Beasthood.

  •      The strategy is simple yet effective. Do not equip a second weapon on your right hand.  Enter the boss room and finish off Rom's underlings and proceed towards Rom's head. Use a Beast Blood Pellet and your bare hands to build up beasthood by pressing r1 once and spamming the transformation attack. ( E.g. R1>L1>L1>L1 etc.). Once your beasthood meter becomes complete, take out your weapon and buff it with Bolt Paper and begin attacking Rom. This strategy can either allow you at best to defeat Rom before she enters Phase Two or Phase Three if you manage to prevent her from teleporting, or at least to leave her with little health left.




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Notes & Trivia

  • If you die to Rom after her third stage, a glitch which causes her spiderlings to respawn as passive, blinking versions of themselves may occur. Killing these spiderlings will cause Rom to summon fewer when she teleports, making the fight much easier.
  • You can summon Mensis Scholar Damien to help with this fight. However, he occasionally experiences a bug which causes him to become stuck in the building or the nightmare fog, delaying his arrival.
  • In Lower Pthumeru Chalice, you can summon Madman Waller and Tomb Prospector Olek to help with the fight. They serve as a distraction for the spiderlings. However, they have a tendency to attack the spiderlings at the front, and they do not run away from Rom's melee explosion attack.
  • Rom may sometimes become distracted when a player uses either the Music Box or a Shining Coin.
  • During phase 1 there is a brief moment in the music loop where you can hear a young woman giggling.
  • Lore theories can be found under Kin Lore.






    • Anonymous

      17 Mar 2018 05:52  

      I tried and tried and tried fighting Rom in the dungeon, it was giving me a lot of trouble because I was under leveled. This was my third character and I wanted to keep the level low for PVP and co-op while the game is free on PS+.

      Personally I found that the method that worked was bringing in both NPC summons. This of course tripled Rom’s health pool, but her large heath pool wasn’t much of an issue in the end. The NPCs helped draw away the spiders and Rom’s one-shot-kill magic spells. I focused on getting rid of the spiders after every teleportation before focusing on Rom. Both NPCs were dead by the time I got rid of the third batch of spiders, but since she only teleports twice she was wide open and easy to whittle down as a low level character.

      I found that once I made it past the second teleportation, killed off all of her spiderlings and stayed within melee distance from her, then she’d almost stop using magic and would spam her body slam attack (maybe 1 in 10 of her attacks would be the AOE blast, but all other magic stopped). Once I got to this point it was just a matter of dodging around her body slam, make a few hits, rinse and repeat.

      This method does require some luck, since I couldn’t survive being the main target of her magic for most of the fight, but if I kept my distance from both Rom and the NPCs, then they’d draw almost all of her ranged spells and keep me alive. So after a certain point the fight becomes more or less of a race to trigger her two teleports and then kill all or most of the spiders before Rom takes out both NPCs. Once I did that then the rest was easy even though I was doing pitifully low damage with my +6 saw spear.

      • Anonymous

        16 Mar 2018 13:52  

        so i made a new character to help new players (free Bloodborne on ps+) get through the game. i had some problems with Rom in the dungeon, since my character was only level 30 or so and i kept dying. after dying like 5 times i decided to just shoot her in the last phase and it worked very well. she is a huge target and the other spiders won't block the shot, because they're too small, so i took down the last third using only QS Bullets. now this character does go for bloodtinge, but at the time my bloodtinge was like 20, so not really high. and i was using the normal pistol (not the evelyn). now since i don't care that much about leveling up i spend most of my echoes for consumables, which means that i pretty much always use bone marrow ash when i want to, which i too did use on her.
        it's sort of cheap maybe, but at low level most of the bosses are cheap too, because there's a lot of attacks that one-shot you, so i thought it was ok (i tried 5 times with melee after all). just a tip for someone who repeatedly dies at the last phase. i know the usual mindset when playing Bloodborne is to not use your gun for damage because you probably tried it at the beginning of the game and realized that it's really only intended to counter (not talking about the cannon of course), but in some cases you can and to great effect. especially when you're underleveled you gotta use all you have.

        • Rom, the Vacuous Spider [Bloodborne Wiki]27 Feb 2018 09:47  

          I usually kill most of the minor spiders and then i land 3-4 attacks on its back.....a +6 +7 Tonitrus is sufficient to deal massive damage to Rom or a fire infused weapon....anyway, the Chalice version of Rom in much more powerfull than the normal version....
          I faced him many times in the Chalices before Killing him in Byrgenwerth and when i killed him in Byrgenwerth i couldn't believe how easy it was to kill him in its normal version.....i never even used a Blood vial during the fight.....

          Another strategy is to ignore every single minor spider and seek for an opening between all the minor spiders.....when you see an opening just buff your Tonitrus without locking Rom and sprint to him, land 2-3 ttacks and then flee.....if you stay too close to him you will be dead due to the spiders jumping at's a long fight but it's even painful sometimes....

          • Anonymous

            27 Feb 2018 08:01  

            On chalice version. Hiding behind pillar is the key. Meteor is so painful and the one make battle is so dreadful. Waiting until it's done cast meteor spam, hit and run back to pillar. Repeat. Don't get greedy. Oil Urn and Molotov are effective though.

            • Anonymous

              10 Feb 2018 12:06  

              God, I hate this boss. The design is okay, I guess, but it still looks like a gigantic rotten fungal potato with a meteor for a head spitting and spontaneously giving birth at you, so...
              Anyways, a good tip is to damage her during her TP animation, as she takes extra damage then. Summoning Damien is a pretty good idea because he can heal both you and himself with the Choir Bell.
              The spiderlings and Rom both take much MUCH more damage when hit in anywhere not the head. That's how you get rid of the magical-YOLO-Sudoku Spider*****s, but it's not that easy either because most of the time they have their face pointed at you, and other times you're in the 'YOU DED LOL' screen.
              The lore is good, at least, but there does seem to be a lot of speculation on the matter. You can just skip this, but I personally believe that Rom is a scholar, ascended to become an Old One to hide the secrets of the blood moon.
              Of course, Beast Blood Pellet is good, just like it is against any other boss.
              When he teleports, more often than not, he'll spawn DOUBLE the spiders because he's a f******* ****** **** ************** ********* son of a ********** ******* ***** ****ing ****** ********* ***** *********'s godamn asshole!
              The crystals can be dodged via just sprinting, or if you're on NG+, the Lake Shield works as well.

              Those are some tips, and Rom can go suck a ******** ******** ******* of a ************ing ***************.
              Thank you.

              • Anonymous

                24 Jan 2018 05:03  

                I had the thought that maybe Kos didn't "give" Rom their eyes, but perhaps Rom's eyes were obtained during Byrgenwerth's raid on the Fishing Hamlet, and those are actually the eyes that belonged to the slain villagers. If you manage to peek under their hoods, the fish people also have black eyes like Rom's and the Pthumerians'. After all, Micolash is clearly missing some screws, and for some reason I doubt that Kos had any choice in the events at the Fishing Hamlet. ("Hunt the Great Ones, hunt the Great Ones...")

                • Anonymous

                  20 Jan 2018 19:58  

                  Okay idk if it's a mechanic but if you cast even just once, call from beyond. She'll target you everytime with hers.

                  • Anonymous

                    19 Dec 2017 04:00  

                    Probo not a reliable strat but I just went in there with my +6 cane and some bolt paper, completely ignored the spiderlings and focused on attacking rom while dodging spiderlings. Fight was very quick. Just roll out to heal and then when there's an opening go back in and attack her.

                    • Anonymous

                      15 Dec 2017 03:50  

                      I don't know what I did (it involved Hunters Axe +6 with bolt paper), but in Phase 1 I took off about 2/3rds of her health. She went right to Phase 3, but TWO sets of f***ing spiderlings spawned, one around Rom like usual and the other where I assume she would have teleported to in Phase 2. So I got swarmed by 24 little spiders and then arcane meteored into oblivion.

                      • Anonymous

                        15 Nov 2017 17:58  

                        I feel that this boss is a case of 'Visuals first, gameplay later'. They design Rom and then had no idea how to make it into a challenging boss; so they said "***** it" and had the boss spawn in an unbearable amount of adds that deal absurd damage. If you try to deal with them first, you're butt*****ed by 100 asteroids from the boss itself. If you try and focus the boss you're gangraped by the*****ty little spiders.

                        I love this game but by god does it have some cheapo bosses and enemies.

                        • Anonymous

                          17 Oct 2017 15:42  

                          Confirmed with Ludwigs Holy Blade only on Phase 1.

                          Kill all the spiders first, then just spam charge attacks at Rom's side with the blade and bolt paper. When it tries to teleport, just keep spamming, it will be unable to teleport and will never attack you as it will be unable to reach Phase 2

                          • Anonymous

                            02 Oct 2017 09:53  

                            Got the kirk hammer, locked onto Rom and waited for the spiders to make a hole. Jump in, one to two hits, jump out.

                            • Anonymous

                              20 Sep 2017 22:02  

                              I killed it/she/her and got 171941 blood echoes. Could anyone tell me what ng+ i am? I accidentally sold my nico cages

                              • Anonymous

                                29 Aug 2017 19:28  

                                "There is a brief moment in the music loop where you can hear a woman giggling." I still don't hear what people are talking about, but phase 2 has incredibly prominent, sibilant whispering and masculine voices all the way throughout...

                                • Anonymous

                                  26 Aug 2017 05:24  

                                  In the chalice dungeon standing behind the pillars blocks the ranged attack so if you're patient you can hide behind one while the ranged attack is going and just bait the spiderlings towards you one at a time, then run out and attack her when they're all dead.

                                  • Anonymous

                                    01 Aug 2017 13:17  

                                    Beast Blood Pellets + unupgraded Saw Cleaver - decimate tiny spiders with normal weapon, switch to saw, take pellet, whale on head until Beasthood meter full, proceed to attack her body and vaporise her with your increased damage

                                    • Anonymous

                                      16 Jun 2017 19:18  

                                      hey wait a second, if every Great One "loses" their child, then wtf are those????? dear god, I hope nobody in Yharnam had to give birth to giant stone-headed spiders....

                                      • Anonymous

                                        26 May 2017 21:48  

                                        I still haven't seen anyone mention how funny it is that Rom is both named after a ROM computer chip and designed to resemble one. For that reason alone, Rom has become one of my favorite boss designs in Soulsborne.

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