Decay
Decay is a Curse card that is Unplayable and deals 2 damage to you at the end of every turn it remains in your hand. Because it cannot be played, it must be discarded naturally at end of turn, but the damage triggers first. In a typical 5-card hand, drawing Decay means taking 2 unavoidable damage per turn cycle unless it is drawn during the cleanup phase of your last available turn. It is one of the more damaging curses over a long fight and has no upgrade.