Samukai

The four-armed King of the Underworld. He was defeated by Lord Garmadon when he was banished to the Underworld, causing him to step down and allow Garmadon to control the legions of the Underworld. Samukai leads the Skulkin Army in the Surface World of Ninjago, carrying out Garmadon's orders and seeking the Golden Weapons of Spinjtizu. Soon, Samukai possessed the four weapons and betrayed Garmadon, only to be vaporized by the power of the weapons combined. His choice of weapons are four bone daggers he uses because of a mutation that granted him four hands, making him superior to all skeletons.