The Sword of Cthulhu is a boss that can be summoned in the Warrior Revolution event. In this event, special enemies bombard you with swords and spears. This boss can only be summoned using the Suspicious Looking Sword, crafted using 100 Sword Fragments (50% chance to be dropped by any enemy in the Warrior Revolution event). It drops Souls of Slight (To disrespect; to ignore the pleads of.)