Elena, Turk Recruit is a rare Legendary Creature — Human Assassin card from Final Fantasy Commander (FIC), collector number 18. Current market price: $0.25, TCGplayer market prices via Scryfall.
When Elena enters, return target non-Assassin historic card from your graveyard to your hand. (Artifacts, legendaries, and Sagas are historic.) Whenever you cast a historic spell, put a +1/+1 counter on Elena.