This odd band of viking-like pirates first appeared pillaging the northern shores of the Unicorn Forest. They have a habit of repeating certain words or phrases three times. The original Berserkers resembled vikings and were apparently all killed when their ship was sank, but Hammerhand was later mystically resurrected by Mumm-Ra who summoned up his spirit to animate a clone of Panthro which he had created. When the plan failed, Hammerhand's spirit broke Mumm-Ra's control and the clone body shifted into Hammerhand's original form before departing. Hammerhand had reformed the Berserkers with new members endowed with cybernetic bodies and powers like his own. Mumm-Ra enlisted them into capturing Lynx-O, Ben-Gali, Pumyra, and the two Berbils that rescued them.