Kars and the Pillar Men are the remnants of a fourth underground race of humanity that. In his desire for power, Kars exterminated the others, leading to the stone mask creation. During the final battle, JoJo's victory -- and his arm -- are cut short when Kars survives the volcano by forming an air bubble shield. Kars learned how to use the Ripple at a much stronger potency than JoJo's. As Kars is about to kill JoJo, JoJo holds up the Red Stone of Aja, causing the island to erupt and launch them into the sky.