Diablerie

Diablerie the act of a younger vampire from the World of Darkness draining an older vampire of blood, killing it, and absorbing its power. It is a heavily condemned action in vampire society, often resulting in a blood hunt being called on the diablerist. Diablerie is an action that is possible to commit in the Vampire: The Eternal Struggle.

In Vampire: The Requiem, diablerie refers to the draining of another vampire's soul after completely draining their Vitae. Due to the changes in mechanics, diablerie isn't really worth doing anymore, as the punishment for doing so remained unchanged, the rewards have greatly diminished (essentially free XP vs. a decrease in generation that was almost impossible to get any other way), and the odds of getting caught have greatly increased.