Locke, Treasure Hunter is a rare Legendary Creature — Human Rogue card from Final Fantasy Commander (FIC), collector number 87. Current market price: $0.26, TCGplayer market prices via Scryfall.
Locke can't be blocked by creatures with greater power. Mug — Whenever Locke attacks, each player mills a card. If a land card was milled this way, create a Treasure token. Until end of turn, you may cast a spell from among those cards.