Doomcaliber Knight [SJCS-EN006] Ultra Rare RC21 you can discard this card

you can discard this card to reduce the Battle Damage inflicted to your Life Points from 1 of your opponent's monster's attacks to 0

gain Life Points equal to the difference at the end of the Damage Step

Set: EX: Hidden Legends Type: Grass Rarity: Ultra Rare Retreat cost: Colorless

Set: EX: Team Rocket Returns Type: Supporter Rarity: Secret Rare

you can negate the Summon of a monster and destroy it

Doomcaliber Knight [SJCS-EN006] Ultra Rare RC21 you can discard this cardSet: Shonen Jump Championship Series Prize Cards Card type: Effect Monster Rarity: Ultra Rare Attack: 1900 Defense: 1800 This card cannot be Special Summoned. When an Efffect Monster effect is activated, you must Tribute this card. Negate that effect's activation and destroy the monster.