Revivify the Cold Vitae
Description: Cappadocian scholars spend much of their time away from the living and among the dead. This practice can make hunting for living blood problematic, and the blood of corpses loses its potency so quickly as to be useless after a few hours. With this ritual, the vampire may refresh the vitae locked in a fleshy corpse to allow her to feed without hunting for living prey. The cold blood created thus is considered reprehensible by some vampires and a delicacy by others.
System: The vampire must have access to a whole (or mostly whole) human corpse that still has a substantial amount of flesh on it, no matter how putrid. The ritual takes half an hour to perform, and it revivifies a number of blood points equal to the player's successes on the Intelligence + Rituals roll. The cold blood works just like normal mortal vitae, save that consuming it causes very little pleasure in the vampire. The cold blood remains fresh for only a scene.
The rite transforms the putrid fluids of the corpse and thus makes that body useless for further necromantic arts (including the Cadaverous Animation path). Therefore, many Cappadocian scholars keep larders of lesser rotting corpses for their nourishment and save prized bodies for experimentation.
Reference: Dark Ages Core Book 2nd Edition - Mortis Ritual - Page 196.