Idaten the Conqueror Star (BLRR-EN039) - Battles of Legend: Relentless Revenge 1st Edition

2 Level 5 or higher Warrior monsters
If this card is Fusion Summoned: You can add 1 Level 5 Warrior monster from your Deck to your hand. You can only use this effect of "Idaten the Conqueror Star" once per turn. Once per turn: You can discard any number of cards; this card gains 200 ATK for each card discarded. Once per battle, if this card battles an opponent's monster with an equal or lower Level, during damage calculation (Quick Effect): You can make that opponent's monster's ATK become 0 during that damage calculation only.