Each stack increases critical damage taken by 5%.
Take 60% weapon damage as Poison damage every 0.25 seconds for 3 seconds. Can critically strike.
The hunter who applied this mark gains +30% Critical Chance against this enemy for 3.5s.
A harvested soul. Stacks up to 25, then the full charge is spent to release Soul Impact. Fades 120s after the last soul taken.