Originally Posted by e_alert

The same way anyone else would take something from a seabed. It's a simple practice called diving. Remember the Divers in TWW? It could also be hauled up, the same way you get stuff from the seabed yourself in TWW. In the end, it's a game. For all we know, the Master Sword could have made itself appear in the Lost Woods.

He's been brought back before, there's no reason he can't be again.