As Seth your Grimoire contains 7 sin cards one for each of the 7 deadly sins.

This new card type can be played for free. You spend an action to play a sin card resolve its effect and then perform a different action.

The effect of a sin card is minor but after that effect the sin card is attached to your character skill card. For an action you can rain a hail of magical bullets down on your enemies dealing collateral damage based on the number of sin cards you have collected.