Mega Rayquaza ex (084/103) [ME06: Delta Reign]

Ability: Ruler's Roar Once during your turn, when you play this Pokémon from your hand onto your Bench, you may use this Ability. Look at the top 4 cards of your deck and attach a Basic Energy card you find there to this Pokémon. Shuffle the other cards and put them on the bottom of your deck.

[RLC] Storm Emerald (50x)
This attack does 50 damage for each Fire Energy and each Lightning Energy attached to all of your Pokémon.