Lutri, the Spellchaser (Ikoria: Lair of Behemoths)

Legendary Creature — Elemental Otter - 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.