The Unity Staff is a staff weapon that has a unique trait of having an electricity enhancement on it. It is not easy to obtain however as you are required to find two pieces of the staff and then take them to a specific location to find a chest with the staff inside.
The Staff pieces can be found in the following locations:
Now that we have both pieces of the Unity Staff, make your way back to the area where you fought the two forgers on platforms either side of a gap earlier. Remember the locked gate on the left hand platform here? If you open your inventory screen and equip the Staff’s Head as Harkyn’s weapon, you can use a melee attack on the gate and it will open. Inside is a chest containing a new Weapon – Staff (Unity).
Note that looting the Unity Staff will have a Spirit spawn on the small balcony platform just outside the room, so be prepared to fight as you leave!