Giant Kra-Corn

When an opponent's monster declares an attack: You can Special Summon this card from your hand in Defense Position, and if you do, change the attack target to it and perform damage calculation. You can target 1 Plant monster you control, except "Giant Kra-Corn"; the ATK of both that monster and this card become their total original ATK. You can only use each effect of "Giant Kra-Corn" once per turn.