Magesmasher Maul

Weapon (maul), legendary (requires attunement)

Magesmasher is a fearsome maul that has a +1 bonus to attack and damage. In addition, against spellcasters the hammer deals an additional 1d6 radiant damage.

By uttering a command word in dwarven, the hammer can cast stonebeard on its wielder once per day. If the wielder is also wearing golden gauntlets their Strength score becomes 23.