Found in Irithyll of the Boreal Valley.
Upon reaching the swamp area below the city, past the dark room filled with Irithyllian Slaves, follow the right side to find the corpse of a Man-grub holding the spell. It is guarded by two Sewer Centipedes.
Restores HP for the caster and nearby allies equal to 5.5 times the Spell Buff of the catalyst, and consumes 205 stamina. For catalysts that also scale with Intelligence such as Crystal Chime and Sunless Talisman, only the Spell Buff from Faith is taken into account.
Due to the high stamina cost of this spell, action after casting is severely restricted, preventing the caster from rolling or attacking immediately after.