Umbreon & Darkrai GX

Boost Fang (150)
This attack does 60 damage to 1 of your opponent's Benched Pokémon-GX or Benched Pokémon-EX. (Don't apply Weakness and Resistance for Benched Pokémon.)

Dark Moon GX
Your opponent can't play any Trainer cards from their hand during their next turn. If this Pokémon has at least 5 extra Darkness Energy attached to it (in addition to this attack's cost), your opponent's Active Pokémon is Knocked Out. (You can't use more than 1 GX attack in a game.)