Enchantment, 2RR (4)
Rare
Whenever you win a coin flip, put a luck counter on Chance Encounter.
At the beginning of your upkeep, if Chance Encounter has ten or more luck counters on it, you win the game.
The more unlikely the victory, the more memorable the success.
Illus. Mark Brill

2/1/2009: You can only win a coin flip if you are the player flipping the coin. Your opponent losing a flip does not count as you winning one. This is a reversal of previous rulings.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander