Dormant Legend (Assault of the Saiyans) [BT7-022_PR]

[Field] (Place and activate this card in your Battle Area. It remains in your Battle Area until you activate another [Field]. When you do, place this card in its owner's Drop Area.)
[Permanent] You can't place cards under this card, except with this card's skill.
[Auto] When a card in your life is added to your hand or placed in your Drop Area during your opponent's turn, place the top card of your deck under this card.
[Activate:Main] If there are 3 or more cards under this card : Place this card in your Drop Area, choose up to 1 red "Broly" card with an energy cost of 4 from your deck and play it, then shuffle your deck.