Set: Battles of Legend: Crystal Revenge ATK/DEF: 450/400 Card Number: BLCR-EN004 Rarity: Ultra Rare Attribute: DARK Card Text: 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. Level: 3 Card Type: Effect Monster Name: Thunder Ball Edition: 1st