at the end of the game, the wizard or the mucus child should be able to take the sword out of the stone

Grog wakes up one night to find them trying to steal his weapon, and the twerp can’t even lift the handle off the ground. He picks up the hammer by the head and spins around to dislodge the kid - which works, insofar as the child flies off toward the mountains, holding some kind of sword. Grog wonders where he got that, and goes back to bed.