Gyarados EX (XY106) [XY: Black Star Promos]

[1] Stormy Seas
Flip a coin until you get tails. For each heads, search your deck for a Water Energy card and attach it to this Pokemon. Shuffle your deck afterward.

[2WW] Splash Burn (130)
This attack does 10 damage to each of your Benched Pokemon. (Don't apply Weakness and Resistance for Benched Pokemon.)