Risky Move is a rare Enchantment card from Onslaught (ONS), collector number 223. Current market price: $1.24 (foil $13.47), TCGplayer market prices via Scryfall.
At the beginning of each player's upkeep, that player gains control of this enchantment. When you gain control of this enchantment from another player, choose a creature you control and an opponent. Flip a coin. If you lose the flip, that opponent gains control of that creature.