Amaranth

Amaranth, also called Diablerie, is the act of destroying another vampire by drinking all their vitae and then consuming their undead soul (or whatever blasphemous force it is that passes for a soul within a vampire's body). The act, though it can confer greater power, is fraught with peril. In the first place, a vampire can get addicted to drinking the blood of other vampires. This in itself presents several obvious problems, not the least of which is a Prince calling a blood hunt if he finds too many of his subjects being attacked by a rogue vampire. Second, there is danger in consuming the soul of another vampire. A strong enough soul can cause severe psychic trauma. Even if the diablerist succeeds in his vile assault, the penalties are harsh, including a loss of Humanity, and an auric taint visible to those who know how to see it. In the Dark Ages, it is something that is looked upon at best with scorn and caution. It is not always a direct line to destruction that it is in the modern times. Princes and Barons on occasion allow, or even welcome, a well-placed diablerie.