M Blastoise EX (18/83)
[XY: Generations]
Holofoil

Flip a coin. If tails, discard 2 Water Energy attached to this Pokémon.

Mega Evolution rule: When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends.

Pokémon-EX rule: When a Pokémon-EX has been Knocked Out, your opponent takes 2 Prize cards.