Hydreigon

Card Number | Rarity: 074/119 | Promo
Card Type | HP | Stage: Dragon | 140 | Stage 2
Card Text: Ability — Dark Impulse

Once during your turn (before your attack), you may attach a Darkness Energy card from your discard pile to your Active Pokémon.
Attack: [2PD] Crazy Headbutt (130)

Discard an Energy attached to this Pokémon.
Weakness | Retreat Cost: Yx2 | 3