Planechase Anthology Planes

Mirrored Depths

Whenever a player casts a spell, that player flips a coin. If he or she loses the flip, counter that spell.
Whenever you roll {Chaos}, target player reveals the top card of his or her library. If it's a nonland card, you may cast it without paying its mana cost.

Whenever a player casts a spell, that player flips a coin. If the player loses the flip, counter that spell.
Whenever chaos ensues, target player reveals the top card of their library. If it's a nonland card, you may cast it without paying its mana cost.