At the end of the Damage Step, if a monster battled: You can Special Summon this card from your hand. You can send 1 Trap from your hand or that s Set on your field to the GY; destroy all other monsters in this card s column. If this card in the Monster Zone is destroyed by battle or card effect and sent to the GY: You can target 1 card in your GY; roll a six-sided die, and if the result is 6, add that target to your hand. You can only use each effect of Thunder Ball once per turn.