Negative Energy Explosion

This card gains 《Shadow Dragon》 in all areas.
(You can only activate this skill once per turn across all copies of this card.) If your Leader Card is a 《Shadow Dragon》 card : Look at up to 7 cards from the top of your deck, then choose one－
・Add up to 1 《Shadow Dragon》 Extra Card among them to your hand, then shuffle your deck.
・If you don't have a Unison Card in play, play up to 1 {Towa, Resonance of Shadow} among them with a marker on it, then shuffle your deck.