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 Idiotic 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)
?? ??


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.




(( Please respect these video posting guidelines))



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.
  • Rom (白痴の蜘蛛ロマ, Roma, the Idiotic Spider) may have been based on the novel "The Idiot" by Fyodor Dostoevsky.








    • Anonymous

      19 Oct 2018 07:34  


      • Anonymous

        27 Jul 2018 22:12  

        wow I just died on her by LITERALLY the last spider left while she had like 10 HP. Should I just quit my BB career now?

        • Anonymous

          01 Jul 2018 07:54  

          I'd be tempted to say that this is one of the worst bosses I've faced in the game so far. It's just so slow and boring and tedious. It's not even actually hard, just if you get impatient you'll do something stupid and die.

          And the Shadows of Yharnam were pretty annoying too, with their ludicrous range after transformation. I hope that the next few bosses make up for these two disappointments.

          • Anonymous

            13 Jun 2018 03:19  

            Killing Rom doesn't actually trigger the Blood Moon, approaching the Queen does.
            I just killed Rom and used a Bold Hunter's Mark to leave instead of triggering the cutscene, and the world was normal.

            • Anonymous

              29 May 2018 15:05  

              I used the good old Kirkhammer and infused it with bolt after dealing with all the little spiders. The L2 attack works like a charm to hit them on the body from a safe distance. Also, you might want to eat a beast blood pellet to maximize damage on Rom once you've dealt with the little ones.

              • Anonymous

                19 May 2018 00:12  

                Tonitrus +7, but probably didn't need to be that high. Old Hunter's Bone. Good arcane defense gear and rune. Ignore spiderlings. Circle Rom and wait for opening amongst spiderlings. Use Old Hunter's Bone. Dash and evade, give Rom six good ones, she teleports. Watch for her attacks and stay out of their way and avoid the errant spiderling who gets close to you. Rinse and repeat. Gone in 60 seconds. Key is Old Hunter's Bone and ignoring spiderlings. I've beaten her dozens of times, quickly, using this method. Substitute quick weapon buffed with lightning paper for Tonitrus, if need be. Good luck, hunters!

                • Anonymous

                  16 May 2018 16:15  

                  Tonitrus or bolt paper are usually a person's first go-to for Rom, which is alright on NG, but once you acquire Bolt Blood Gems and Cursed Bolt Blood Gems, I'd suggest to start infusing them into the weapon of your choice until you have a weapon with 100% Bolt attack that doesn't require constant buffing or frequent repairs. For example, with Arcane scaling and minimal Strength, I turned Ludwig's Holy Blade into a pure Bolt weapon that does INSANE damage to Rom and her poor little babies, as with any enemy weak to Bolt (Rom, Ebrietas, Celestial Emissary, Slime Scholars, etc.). Then you can just toss the Tonitrus in the trash.

                  • Anonymous

                    08 May 2018 18:25  

                    so, the shaman bone blade works on Rom's spiderlings, but will they target Rom herself if you use the bone blade on HER?

                    • Anonymous

                      27 Apr 2018 01:08  

                      I used bolt gem on my saw spear +9. 1rst half.
                      Kill ALL spiders first. Evelyn +9 and bone marrow 2nd half.
                      And yes hide behind pillar from attacks.. Need help?
                      I can try...@Crashed67

                      • Anonymous

                        Rom, the Vacuous Spider [Bloodborne Wiki]21 Apr 2018 02:18  

                        Oh, Rom... you are a horrible, horrible

                        Tonitrus +6 works well on in-game Rom, but not as well on chalice dungeon Rom. Either way, the Tonitrus does work great on her children with its high blunt damage. For the first Rom encounter, I stay just within the circle of spiders so that she doesn't spam her raining iceberg attack, while pretty much moving the whole time to one side. I take out spiders as they get in my way, but I try to focus on getting in solid licks on Rom. When she flops onto her back for the area charge attack, roll into her to dodge it. Her final phase is ALWAYS dangerous no matter what you do, so buff your weapon and use bolt paper if you don't have Tonitrus, as every shot really has to count. In the chalice dungeon, I use a much more aggressive strategy, but basically try to do the same thing. Because there are so many things that go south with this fight, I think it almost always requires a bit of luck, especially towards the end. Just keep with it.

                        • Anonymous

                          19 Apr 2018 21:45  

                          If anyone is having trouble, there is a way to kill Rom without her teleporting once. You'll need a pal though, Murder Rom's Underling in phase one, but do not hit her until all the little spiders are dealt with.

                          You need a pal for step 2, you and your friend require the Flamesprayer, (Can be acquired from
                          1. Gilbert after entering Cathedral Ward (Defeating Vicar Amelia before claiming Gilbert's Flamesprayer will remove this option. Perform option 2 if neccessary.)
                          2. or from obtaining the Radiant Sword Hunter Badge from the Church Workshop, (Requires defeating the Blood Starved Beast!) and purchasing the Flamesprayer for 8,000 Blood Echoes..)

                          Surround Rom on each side, (Not in front of her face! From the sides!) and unleash the Flamesprayer on Rom from both sides. The two Flamesprayers simultaneously will completely stun Rom, making her incapable of teleporting. Upgraded to +3 or +5 should be fine. (Scales with Arcane!)

                          I hope this helps in your future endeavors. If not, feel free to vote me down.

                          • Anonymous

                            13 Apr 2018 04:17  

                            could someone please help me I have tried beating Rom a few times now been ringing my beckoning bell for 30mins at the boss site -can add you for future hunts if you help me :)

                            • Anonymous

                              12 Apr 2018 04:37  

                              Dungeon Rom can be Cheesed by using the pillars to block her Iceberg attacks, Otherwise use the Loch Shield and Tiny Tonitrus to kill her and her minions.

                              • 10 Apr 2018 13:07  

                                found out that a non buffed kirkhammer at +8 is very effective (sword mode for spiderlings, fully charged hammer combo on rom) if I knew about the upward ice hail attack, would of got rom first try

                                • Anonymous

                                  08 Apr 2018 17:26  

                                  I feel like I’m taking crazy pills. Does no one else light up with bolt paper and just do the thing?

                                  Recipe: The quicker attack speed form of literally any weapon (stack that paper), no lock on, angled along her body so you just graze her, and so you get the most movement out of your attack steps. Repeat until she’s dead or you have to back off for 2 seconds for her aoe

                                  9/10 times those attack steps are significant enough to dodge the spider divebomb, which has 0 tracking from when they jump into the air in prep. The only time I have ever bothered to clear the spiders was when I was summoned or had summons, and they weren’t picking up on my AGGRO.

                                  Once in a while, going ham gets me killed, but I’ve certainly spent less time on this annoying turd than I would have if I gave a hoot about the babes.

                                  • Anonymous

                                    04 Apr 2018 22:07  

                                    Anyone know what it is that prevents her from teleporting away sometimes? I enjoy co-oping this spider over and over (damn easy boss, easy blood echos, getting to help folk at the same time) and every now and then we'll manage to just continue hitting Rom without her teleporting away. She keeps backing up and occasionally looks like she might be starting the teleport animation, but she never actually starts the fade and spin animation. I've only done this a few times, once with 3 of us, once with just 2 of us, and I'm not sure if it's just a bug, or if my beckoner is somehow keeping her from teleporting with some kinda stunlock?

                                    • Anonymous

                                      02 Apr 2018 21:43  

                                      If you have plenty of insights you AND you’ve equipped the Legion rune you can summon two hunters to help you with the boss fight. They distract the tiny spiders and allow you to go ham on Rom. I used oil lanterns with molotovs and they do pretty good damage. 10 oil urns and molotovs are really good helpers in this fight. I also equipped 20 throwing knives as they can take off bits of her health when you can’t get too close. The first phase let the hunters whack away at her ‘minions’ while you just go 99% aggressive on her. Backstabs are not possible? I think? I was not able to do them even when fully behind her. Save the molotovs and knives for stage 2 & 3. When she starts teleporting give her a few good whacks, I was using a +6 Ludwig’s Blade. During second stage, prepare to dodge a lot. She won’t spam her meteor attacks too much during stage 2 but it can still kill you within seconds if you dont keep an eye on her movements. Let the confederate hunters distract the spiders once more, concentrate on getting in and getting one or two hits in. I’d suggest dodging left since her spiders always swarm her right side. In the event that its random for each plsyer, dodge in the direction in which there are less spiders blocking your way. Stage 3 is probably the hardest because she starts spamming her power attacks AND she starts fighting back with her....head???? Idk. Anyway this is the stage where molotovs, throwing knives, and bone marrow ash come in use. My dumbass didnt have the updated cannon OR marrow ash during the fight but I think it would do a lot of damage to her. Fire seems to do more damage than bolt but I’m not sure. Hope it helped!

                                      • Anonymous

                                        24 Mar 2018 19:13  

                                        I don't know if this glitch is known but while fighting this boss occasionally she will summon 2-3 waves of spiders on 1 teleport that are not passive. Also I hadn't made it to the third phase yet on this character.

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