Serpent’s Maul

Weapon (maul), uncommon (requires attunement)

This magic maul has 3 charges and regains all expended charges daily at dawn. When you hit with an attack roll using it, you can expend 1 charge to force the target to make a DC 15 Wisdom saving throw. On a failure, the target is magically transformed into a constrictor snake until the end of your next turn as with the polymorph spell.