Caster

This weapon can be modified by Casting a Spell (including a cantrip) with 2 or more actions. If you do, resolve the spell normally. Once the spell is cast, if it had the acid, cold, fire, electricity, sonic, spirit, vitality, or void trait, the weapon deals damage of that type instead of its usual damage until the end of your next turn. If the weapon has the aeon trait and a spell gem installed, this lasts 1 minute. If the spell deals more than one type of damage, choose one when you fire the weapon.