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 {X}, where X is its mana value.
Mana cost
U
U
U
U
Mana value
4
Printings
Reserved list
Never reprinted
Buy
Formats
Legacy
Banned
Vintage
Banned
Commander
Banned
Duel
Banned
Oathbreaker
Banned
Predh
Banned
Rulings
4 Oct 2004
In a multi-player game, it affects all opposing players.