Cell, Metamorphosis of Despair (Zenkai Series Tournament Pack Vol.5)

[Energy-Exhaust] [Permanent] If you have 4 or less energy, this card can't attack. [Auto] If you have 4 or more energy: When this card is placed in a Drop by a [Successor] skill, choose up to 1 of your opponent's Battle Cards and KO it. [Activate:Main] If your Leader is a green or yellow "Android" card and you don't have a Battle Card in play: Play this card from your hand. Additionally, if you have 4 or more energy, declare a number from 0 to 3, and this card's energy cost increases by the declared number for the turn.