The Magician's Judge

Once utilized during the Age of Heroes to execute magic-users convicted of serious crimes, this massive blade was long thought lost to the sands of time.

If you hit a creature with this weapon, you can choose to cast the d ispel magic  spell against the target at part of the attack. Alternatively, you can use your action to cast the Dispel Magic spell at a target of your choice. The spell is cast at 3rd level, and the Ability check bonus for this spell is +3.

Once you use this feature, you cannot use it again until the next dawn.

Proficiency with a greatsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.