Ahsui

This weapon grants you access to the "Ahsui Skills" feat, decribing the abilities below: 

True Reflection
As an action, you can look through Ahsui's reflection, which shows the true form of any illusions, to determine if one object or creature within 60ft is illusory in nature, or under the effect of an illusion spell. This action fails if there is no light to form a reflection on the blade.

Reality Arc
Once per day, you can use your action to swing Ahsui in a wide arc, dispelling all illusions within a 30ft cone. You gain 10 temporary hitpoints for every illusion dispelled this way.

 

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

Notes: Damage, Combat, Versatile, Sap