Pokémon Trading Card Game - Gyarados - EX: Holon Phantoms 8

Poké-Body: Delta Reactor
As long as any Stadium card with Holon in its name is in play, each of your Pokemon that has δ on its card does 10 more damage to the Defending Pokemon (before applying Weakness and Resistance).

Hyper Beam 20
Flip a coin. If heads, discard an Energy card attached to the Defending Pokemon.

Heavy Impact 80