When this spell is cast you drink in the life force of creatures in the area of effect. Creatures who succeed at a save lose only half their remaining hit points, while those who fail their saving throw lose all their remaining hit points and are instantly slain. The total amount of damage done by this spell is then added to the casters Hitpoint total. Moreover, the life-force of slain creatures coalesces as a shadow turken , which will attack any surviving enemies. You are only able to absorb enough hit points to restore you to full health, remaining points dissipates into the fabric of the weave.
This spell is not stopped by Death Ward or similar effects.
The in-game description incorrectly states that this spell is subject to spell resistance.
This spell actually damages hostile undead, instead of healing them (bug?)
This spell is subject to negative damage resistances and immunities.
To learn this spell, a character must take the feat Epic Spell: Vampiric Feast.
Type of feat: Epic
Prerequisite: Ability to cast 9th level spells , Spellcraft 24 ranks
 Any level 9 spell qualifies, regardless of class. Any dark invocation also qualifies, regardless of its equivalent spell level.