Lutri, the Spellchaser is a rare Legendary Creature — Elemental Otter card from Ikoria: Lair of Behemoths (IKO), collector number 356. Current market price: $4.42 (foil $14.62), TCGplayer market prices via Scryfall.
Companion — Each nonland card in your starting deck has a different name. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) Flash When Lutri enters, if you cast it, copy target instant or sorcery spell you control. You may choose new targets for the copy.