Added the ability to add cost modifiers
Added Effect to Add Cost Modifiers
Added effect to remove the Cost Modifiers when the card is gained or the turn ends
Can now load the Add Cost Modifier Effect
Added ability to ensure a cost cannot be less than 0
Added Green Arrow's Bow
Added Aquamans Trident
Added Arkham Asylum
Added Bane
Added Batmobile
Added Black Manta
Added Bulletproof
Added Catwoman
Added Cheetah and made Pick Cards Conditional on there being cards
Added Clayface
Can now properly fire multiple triggers wven if they are single-use
Cleaned up Events so they properly copy the given context
Moved original Play or Have Played Effect to Play or Have Played Another so the original Play or Have Played can be more semantically meaningful
Added Dark Knight
Added Darkseid