Game of Chaos

Flip a coin; target opponent calls heads or tails while the coin is in the air. If the flip ends up
in your favor, you gain 1 life and the 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