By touching a victim with an Essence pool, the idigam can scar his Essence flow with a malign mark. If the idigam succeeds in a Power + Finesse roll opposed by the prey’s Resolve + Primal Urge (Resistance for spirits), it causes the victim to suffer horrendous hemorrhaging when he tries to spend Essence. The Essence trap inflicts one lethal point of damage for each point of Essence the victim expends. The mark remains until the idigam is destroyed or the victim empties his Essence pool entirely.