Game Of Chaos

Flip a coin; target opponent calls heads or tails while coin is in the air. If the flip ends up in your favor, you gain 1 life and that opponent loses 1 life. Otherwise, you lose 1 life and the opponent gains 1 life. Effects that prevent or redirect damage cannot be used to counter this loss of life. The winner of each round decides whether to continue. Double the stakes in life each round.