Once per turn, during your Standby Phase: Toss a coin. If the result is Tails, the following effects are negated until your next Standby Phase. ● When you Summon an "Arcana Force" monster, choose which effect to apply without tossing a coin. ● If your "Arcana Force" monster destroys an opponent's monster by battle: You gain LP equal to the destroyed monster's original ATK.