Curse cards can be added to a attack modifier decks through various effects (like negative scenario effects or becoming cursed).
Curse cards have either a (M) or (*) to denote whether they can be placed in the monster attack modifier deck (M), or a character's attack modifier deck (*).
When a curse is drawn as part of a figures attack, it nullifies the attack making it do 0 damage.
After this card has been revealed through one of the figure’s attacks, it is removed from the deck instead of being placed into the attack modifier discard pile.
It is also removed from the deck at the end of the scenario if it is still in the deck.