The ability doesn’t care whether Old Man of the Sea remains under your control, only that Old Man of the Sea remains tapped and its power remains large enough. If an opponent gains control of Old Man of the Sea, you’ll keep control of the affected creature (until Old Man of the Sea stops being tapped or it no longer has enough power).
Once the ability resolves, it doesn’t care whether the targeted permanent remains a legal target for the ability, only that it’s on the battlefield and its power remains small enough. The effect will continue to apply to it even if it gains shroud, stops being a creature, or would no longer be a legal target for any other reason. If it stops being a creature, its power is considered to be 0.
If Old Man of the Sea stops being tapped before its ability resolves — even if it becomes tapped again right away — you won’t gain control of the targeted creature at all. The same is true if the targeted creature’s power becomes greater than Old Man of the Sea’s power before the ability resolves.
This printing is one of 3 catalogued treatments from ME3 — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #45 of *Masters Edition III*, the set that shipped alongside the September 2009 Masters Edition III release.
Card type: Creature — Djinn, color identity blue, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {1}{U}{U} (3 converted).
Legal in Legacy, Vintage, and Commander. This printing is on Wizards of the Coast's Reserved List — Wizards has committed never to reprint cards on that list, which underwrites a structural scarcity floor on every surviving copy.
EDHrec ranks this card #25,505 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Susan Van Camp. Rarix catalogs 121 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Susan Van Camp
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
You lose control of the creature if the Old Man leaves the battlefield. This is because it is no longer tapped.
