Koraidon 091 - Holofoil SV Scarlet & Violet Promo Cards - Promo Number_RA04-EN229 you can return it to

you can return it to the Deck to Special Summon 1 "Gladiator Beast" monst

except Xyz Monsters

TypeRock / Synchro / Effect Monster

Whenever you would take damage from a card effect

Colorless Metronome Choose 1 of the Defending Pokémon's attacks

Koraidon 091 - Holofoil SV Scarlet & Violet Promo Cards - Promo Number_RA04-EN229 you can return it toRarityPromo Hit Points140 HP Fighting,Unknown,Unknown,Colorless Primeval Battering (30x This attack does 30 damage for each of your Ancient Pokmon in play.) Fighting,Unknown,Unknown,Fighting,Unknown,Unknown,Colorless Shred (130 This attack's damage isn't affected by any effects on your opponent's Active Pokmon.) Weakness Unknown None Resistance Unknown None