Mark of the Heretic

The Haven Hero's innate Heroic Strike, which has no ranks. It deals the Hero's Heroic Strike damage, of that strike's own damage school, to a target enemy and brands the stack as a heretic for the rest of the combat. Creatures in the Hero's army then deal bonus damage to the branded stack; the bonus is a percentage that scales with the Hero's level, so the in-game tooltip shows its current value. The mark is dispelled if the Hero attacks a different target.