Hall of Gemstone (MIR-) - Mirage Number_81 if one or more of

if one or more of them entered from a graveyard or was cast from a graveyard

put that Pokémon in the Lost Zone instead of discarding

Colorless Drain Wash (30) Flip a coin until you get tails

They mutate into the creature on top plus all abilities from under it

Hall of Gemstone (MIR-) - Mirage Number_81 if one or more ofCasting Cost Card TypeWorld Enchantment RarityRare ArtistDavid A. Cherry Legalities NOT LEGAL Standard NOT LEGAL Future NOT LEGAL Historic NOT LEGAL Timeless NOT LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl NOT LEGAL Brawl NOT LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool LEGAL Premodern LEGAL Predh At