Massimo, the Magician is a rare Legendary Creature — Cat Wizard card from Mystery Booster: Commander Edition (MBC), collector number 45.
Whenever Massimo or another creature you control enters, exile up to one target instant or sorcery card with mana value 1 from your graveyard. If a card is exiled this way, that creature gains "Whenever this creature deals combat damage to a player, copy the exiled card. You may cast the copy without paying its mana cost."