name: Desperate Gambit
originalText: Flip a coin; target opponent calls heads or tails while coin is in the air. If the flip ends up in your favor, double the damage dealt by a source you control. Otherwise, prevent all damage from that source.
printings: WTH
text: Choose a source you control and flip a coin. If you win the flip, the next time that source would deal damage this turn, it deals double that damage instead. If you lose the flip, the next time it would deal damage this turn, prevent that damage.
type: Instant