Crimson Fury
This power is the subject of much rumor and conjecture, as it has very little visible effect. Upon reaching this level of mastery, the Gangrel may chose to allow his Beast to roam freely through his veins. His blood causes frenzy in mortals and vampires who taste it. Should a diablerist successfully consume a Gangrel's soul, she may well meet a grisly end as the Gangrel's Beast eats her away from the inside.
System: This power is activated once, when the Gangrel learns it. It cannot be turned off. The smallest taste of the vampire's vitae causes agitation in the taster, who must make a Self-Control roll (difficulty 7) or frenzy immediately. This applies to newly created childer, ghouls, attackers who bite and any vampires who would drink from the Gangrel. This is the equivalent of a warning shot for would-be diablerists. Should the attacker resist the urge to frenzy, she may continue to drink as normal, but the supernatural agitation she experiences should be a clear sign that something is unusual about this vitae. If the attacker succumbs to the frenzy, she must spend a Willpower point for each turn she continues to drink.
Should the diablerist be successful, she immediately suffers a +2 difficulty on all frenzy rolls for a duration determined by the Storyteller. She must also make an opposed Willpower roll against her victim's Beast (which has the same Willpower rating that the now-deceased vampire had). The loser of this contest forfeits one permanent Willpower point. This contest takes place every month for the first year past the diablerie, and once a year thereafter. AS the diablerist loses Willpower, she becomes more feral and impulsive (this should be roleplayed, and the Storyteller should feel free to require frequent Self-Control rolls from the diablerist's player). If the invading Beast loses its last Willpower point, it becomes quiescent, ceding victory to the diablerist. The evidence of diablerie in the perpetrator's aura persists until the Beast is subdued.
Humanity and Path rating loss may result from the actions the "possessed" diablerist takes, but they are not lost as a direct result of this power.
Gangrel legends suggest that some incredibly powerful "victims" of diablerie have eaten their way through their attackers, consuming the diablerist's soul in turn, and then taken over the new body. This is not the normal result of this power, but rumors do circulate...