Vampire
A feeding attack that heals Coen and hurts what he is feeding on. Distinct from ordinary blood drinking in that it is an offensive move rather than a recovery one — and it is the ability the Sanguine Renewal Ultimate is built around. The walkthrough uses it three different ways, which is the thing worth knowing about it. As an opener on an unsuspecting enemy it drains them for the upper hand, but the drain is interruptible — the one shown is cut short when the target's comrades arrive. Mid-fight it works as an ordinary active perk, healing while it damages. And out of combat it is the feeding tool: Coen grabs a victim and, unless hunger has already taken the decision away from him, chooses how far to go — a partial drink that leaves them unconscious, or all the way.
Named in tree coverage and since seen in play in a developer-narrated walkthrough. Its position in the tree, its prerequisites and its point cost are still unpublished.