A secret symbol left by Caryll, runesmith of Byrgenwerth.
A transcription of "moon", as spoken by the Great Ones inhabiting the nightmare.

Gain more Blood Echoes.
The Great Ones that inhabit the nightmare are sympathetic in spirit, and often answer when called upon.

Moon is a Caryll Rune in Bloodborne.


Moon Effects

  • Tier 1: Increases Blood Echoes gain from slain enemies by 10%
  • Tier 2: Increases Blood Echoes gain from slain enemies by 20%
  • Tier 3: Increases Blood Echoes gain from slain enemies by 30%
  • The runes stack multiplicatively (110% x 120% x 130%)



  • In Hypogean Gaol between 2 of the Snatchers near your lantern.
  • In Mergo's Loft at the bottom of the spiral staircase where you fought Micolash.
  • Stand in front of the Brain of Mensis's eye in Nightmare of Mensis and use the "Make Contact" gesture. (Note: it takes around 25-35 seconds for the rune to appear). To get there, start at the Mergo's Loft Middle Lamp and run up the stairs past the crow dogs and ride the single cage elevator down. As you are riding it down, you will see an open window and you must roll-dive through it. Continue along this path past the enemies until you see a single green lever on a narrow walkway to the right of the little hole you drop through (don't drop down the hole). Pull the lever and a cut-scene will play out with the Brain of Mensis falling through a pit. Now you must leave this area and go back to the first area past the spider mini-bosses and the hunter on the bridge. Once you get here, go down the stairs past the dwarves into the big hall will giant pits in the floor. Go past the single giant armored dwarf and you will see a single green elevator cage next to a huge pit in the ground. Climb the elevator all the way down to the black abyss. You can step out and you will not die. You will hear some breathing sounds and you will faintly see an outline of the Brain of Mensis you dropped earlier. Go up to it and perform the "Make Contact" gesture. Stay in this pose for about 30 seconds, after which your hands will move position and you will receive the final and most powerful "Moon" rune. You are free to kill the Brain of Mensis after this and you will receive a Living String (Chalice Dungeon





Trivia goes here


Caryll Runes
Anti-Clockwise Metamorphosis  ♦  Arcane Lake  ♦  Beast  ♦  Beast's Embrace  ♦  Blood Rapture  ♦  Clawmark  ♦  Clear Deep Sea  ♦  Clockwise Metamorphosis  ♦  Communion  ♦  Corruption  ♦  Deep Sea  ♦  Dissipating Lake  ♦  Eye  ♦  Fading Lake  ♦  Formless Oedon  ♦  Great Deep Sea  ♦  Great Lake  ♦  Guidance  ♦  Heir  ♦  Hunter  ♦  Impurity  ♦  Lake  ♦  Milkweed  ♦  Murky Deep Sea  ♦  Oedon Writhe  ♦  Radiance  ♦  Stunning Deep Sea


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    • Anonymous

      I'm fairly certain Mother Brain respawns. I was farming dirty gems above using beast roar and taking the lift down to collect and she was there after I'd already killed her. Don't know if making contact would still work if you'd killed her before.

      • Anonymous

        "The Great Ones that inhabit the nightmare are sympathetic in spirit"

        Curious. I did not know their motivation was even comprehensible to humans.

        • Anonymous

          Moon rune appears in Yaha'r Gul if you don't get it in Hypogean Gaol. It's near the hostile hunter that's in front of where the lamp used to be in Hypogean Gaol.

          • Anonymous

            110 + 120 + 130 = 170% increase

            so in the cummmfpk chalice, you'd get around 142000 per 20 seconds. or 426000 per minute

            • Anonymous

              There's a fourth moon rune if you keep making contact with the brain for a half hour or so after getting the third one. I just left my ps4 on, went to make dinner, and came back and it was there.

              • Anonymous

                Since nobody posted the actual amount you're blood echoes increase after all 3 runes were stacked, it's 1.716. or 171.6%. Killing the female beasts in room 1 gives you CRAZY blood echoes, managed to get my arcane to 70 before changing to the blood moon phase.

                • Anonymous

                  Just fyi, the rats before the beast claws drop about 2000 each BEFORE equiping all three runes. Combined with the hunter in the back, you get close to 50000 each run. Happy hunting

                  • Anonymous

                    By equipping all three Moon runes, completing a full offering Depth 5 chalice dungeon will net you roughly 1.5-2 million echoes after killing every enemy and boss. I never equip any other runes, in fact. It’s OP or no-P.

                    • Anonymous

                      The location portion of this page should be rewritten, or deleted entirely because at this point in time it's terribly unclear, and pretty much impossible to follow. Compare this to the actual walkthrough which could actually just have been copy&pasted (no brainer?) into the section instead of whatever you call that.

                      • Wow! Wait, whaat? Use the Make Contact emote in front of a gigantic dying brain in the dark... Seriously, how could you figure this out by yourself lol? This game is amazing, but the players dedication is even more amazing. Thank you guys.

                        • Moon is very useful way of getting mores echoes when forming and it is good to stack them at ng+2 you can have 3 tank 3 moons which would give you 90% not echoe yield when all rank 3 moons are stacked

                          • I found out the hard way that you can only choose either the blood stone or the rune with the chalice. I choose the rune thinking it would drop the rock. But obviously that's asking alot lol.

                            • Anonymous

                              Is the math on using more than one of these multiplicative or additive? For example, assuming the thing you kill gives 100 echoes. 100*1.6 Or 100*1.1, then that number times 1.2, then that number times 1.3?

                              • Anonymous

                                In NG+, if you have all three of the moon runes equipped, you can become extremely over-leveled and destroy the game.

                                • Anonymous

                                  How does the multiplication of percentages work? If I'm using 1 and 2 together, will I get 10% of the 20% as well as 20% of the 10% ( as well as the base 10 and 20%) to make 34%? can someone explain how that works?

                                  • Anonymous

                                    I just successfully used the ''contact'' gesture about 10 minutes after killing Mother Brain (without respawning) and I got the third ''Moon'' rune.

                                    • Anonymous

                                      When I went to the Brain with no Insight, I didn't get the rune. After I popped a Madman's Knowledge, I got it. This could be why some people are saying that it won't work for them.

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