Hydreigon

As often as you like during your turn (before your attack), you may move a Darkness Energy attached to 1 of your Pokémon to another of your Pokémon.

Dragonblast

PsychicDarknessDarknessColorless

140

Discard 2 Darkness Energy attached to this Pokémon.

Flavor Text

This brutal Pokémon travels the skies on its six wings. Anything that moves seems like a foe to it, triggering its attack.