Whenever a player casts a spell, counter it unless that player pays .
Artista: Harold McNeill
Darkness
Prevent all combat damage that would be dealt this turn.
Invoke Prejudice
Whenever an opponent casts a creature spell that doesn’t share a color with a creature you control, counter that spell unless that player pays , where X is its converted mana cost.
Sylvan Library
At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.
Flash Counter
Counter target instant spell.