Yamcha, Training on King Kai's Planet (BT30-118) - Three Glorious Fighters

[Auto] [Limit 1] When this card's power is increased by the skills of your white "King Kai's Planet" card or "Serpent Road" in your Battle Area, switch up to 1 of your energy to Hidden Mode, choose up to 1 of your opponent's Battle Cards with an energy cost of 5 or less, Ko it, and this card gains [Dual Attack] for the turn.