Dr. Myuu, Evil Genius (BT5-069) - Miraculous Revival

[Auto] When you play this card, if you have 4 or more energy, choose up to 1 green {General Rilldo} with an energy cost of 3 from your deck and play it, and it gains [Double Strike] (This card inflicts 2 damage instead of 1 when attacking.) for the duration of the turn. Then shuffle your deck.