Stella Lee, Wild Card is a mythic Legendary Creature — Human Rogue card from Outlaws of Thunder Junction Commander (OTC), collector number 3. Current market price: $4.56 (foil $4.88), TCGplayer market prices via Scryfall.
Whenever you cast your second spell each turn, exile the top card of your library. Until the end of your next turn, you may play that card. {T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you've cast three or more spells this turn.