Blight

Blight is a damage over time effect, represented by a green drop. At the beginning of an affected hero's turn they will take damage equal to the blight strength. Lasts for a specified amount of turns (accessible by hovering cursor over green drop).Most blights in the game last for 3 turns, 5 if applied by a critical strike.

Can be removed with Antivenom, Plague Doctor's   Battlefield Medicine, Hellion's    Adrenaline Rush. Can kill a character on Death's Door before they can use an antivenom on their turn. If out of combat there will be a chance to use food or an antidote to prevent death.

Can be avoided by increasing blight resist.

See also; Status Effects