It has a 10% chance to drop from the boss when it is defeated.
The primary attack of the Kluex Staff is the Kluex Shooter. While the left-hand button is held down and the staff is at full charge, the staff places projectiles at the cursor's location at a rate of 1 projectile per 0.4 seconds (i.e. 2.5 projectiles per second), consuming 25 energy per projectile. Releasing the primary attack button causes the projectiles to fly toward the cursor in the order in which they were placed at a rate of 1 projectile per 0.25 seconds (i.e. 4 projectiles per second). The projectiles have a base power of 27.
The secondary attack consumes 120 energy to place a Kluex Zone at the cursor's location. The Kluex Zone grants strong Rage to players standing in it, multiplicatively increasing their damage bonus by 30%. Once placed, the Kluex Zone disappears after 10 seconds have passed.
When upgraded at a Weapon Upgrade Anvil to tier 6, the base damage of Kluex Shooter projectiles increases to 31.5. Additionally, the Kluex Staff's appearance changes to the one shown below.
Apart from the addition of a gold star to the name, no other changes occur as a result of the upgrade.