SS4 Son Goku, Becoming the Strongest

[Permanent] If your Leader's back side is a green "Gogeta : GT" card, reduce the energy cost of this card in your hand by 4. [Auto] When this card is played, switch this card to Rest Mode, look at up to 5 cards from the top of your deck, add up to 1 mono-green "Vegeta : GT" or "Gogeta : GT" card or Unison with a specified cost of 2 to your hand, then shuffle your deck. At the end ofthe turn, return this card to your hand.