M Diancie-EX

Diamond Force (100): During your opponent's next turn, prevent all damage done to each of your Pokémon from your opponent's Pokémon-EX. (If this Pokémon is no longer your Active Pokémon, this effect ends.) | 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.