Ancient Staff

A simple wooden staff, with patterns of tentacles wrapped around the shaft. An emerald is set at the tap, grasped between four of the wooden tentacles. 

By expending a charge, the user has the option to change the damage type of any spell attack to Psychic, and place an effect on the target, choosing from: Frightened, Charmed, Blinded, Deafened. Each turn the effect is up, if the wielder takes damage, they must roll a con save to keep the effect up. The target may also roll a wisdom save on its turn to try and resist. 

Notes: Damage: Psychic, Damage, Control, Debuff, Combat