Death Mark

The  is a new item in Risk of Rain 2.

Activation
Death Mark is activated by 4 unique debuffs on a target.

These debuffs do not need to be applied by the same player and once an enemy is marked it will remain marked until killed.

Characters without the death mark item still deal the bonus damage to marked enemies. [1] Needs more testing

[2] Needs more testing

* Note that Death Mark does not activate if you have 4 stacks of the same debuff.