Communion is a Caryll Rune in Bloodborne.
- Higher Blood Vial Maximum
- Versions: +1 / +2 / +3 / +4 / +5
- (+1) Cathedral Ward; in a chest directly through the door on your right. This door only opens after you have killed the Blood-starved Beast.
- (+2) Lecture Building
- (+3) Iosefka's Clinic, in a chest after entering from the secret passage in Forbidden Woods
- (+4) Dropped by Celestial Emissary
- (+5) Pthumeru Ihyll Root Chalice (random chance)
- To memorize this rune, you must have the Rune Workshop Tool
- One of only two runes to have five different versions (the other being Formless Oedon)
- Chalice Glyph: rg56w9w8 (Layer 1 pre-area doorway) Rotted and Foetid Ihyll Chalice. Coffin is guarded by a Merciless Watcher.