Cell, Devourer of the Masses

[Energy-Exhaust] [Successor] GY (Choose any number of your mono-green, mono-yellow, or Green/Yellow multicolor Battle Cards whose energy costs add up to the energy cost of this card, place them in their owners' Drop Areas, then play this card from your hand.) [Auto] When you play this card with [Successor], choose up to 1 of your opponent's Battle Cards, ignoring [Barrier], KO it, then your opponent chooses 1 card in their hand and places it in their Drop Area. [Auto] When this card is removed from your Battle Area by an opponent's skill or KO'd, draw 3 cards.