Old Man of the Sea is a rare Creature — Djinn card from Arabian Nights (ARN), collector number 18. Current market price: $240.67, TCGplayer market prices via Scryfall.
You may choose not to untap this creature during your untap step. {T}: Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power.