Rikku, Resourceful Guardian is a rare Legendary Creature — Human Artificer card from Final Fantasy Commander (FIC), collector number 41. Current market price: $0.33, TCGplayer market prices via Scryfall.
Whenever you put one or more counters on a creature, until end of turn, that creature can't be blocked by creatures your opponents control. Steal — {1}, {T}: Move a counter from target creature an opponent controls onto target creature you control. Activate only as a sorcery.