Cast Chain Lightning every 5th attack.

When someone hits you for 150 or more damage, this item loses a charge.

Certain skilled artisans have been able to cobble together bits of Ancient machinery and forge them into weapons. The terrible Charged Hammers, whose electrical current bestows speed to the wielder and excruciating pain to the victim, are a pinnacle of this technique. Their true potency is demonstrated when the lightning trapped within surges forth and dances from one target to the next, leaving behind sizzling corpses.