Thunderbolt

Weapon Enchantment, Legendary (requires attunement)

When you hit a creature with this weapon it takes an extra 2d8 thunder damage, and you can choose to take a bonus action to have the weapon emit a thunderous boom. If you do, the target and every creature within 30 feet of it other than you must succeed on a DC 17 Constitution saving throw or be Stunned until the end of your next turn. Once this property is used, it can’t be used again until the next dawn.