The Ascendant One

JoJo's victory, along with his arm, is cut short when Kars manages to survive the volcano by forming a shield of air bubbles to protect him from its deadly lava. It is explained how Kars (and the other Pillar Men) was a member of a fourth race of humanity who lived underground, which he exterminated when his desire for power led to the creation of the Stone…

Synopsis excerpt via Kitsu.