KRAKOA

Grove was a member of the original mutant society known as Threshold over two billion years ago. Over time, as Threshold fell, Grove evolved to become a living island and ecosystem known as Okkara, as disclosed in Marauders (2nd series) #7-10. A second mutant society was founded there thousands of years ago, overseen by Apocalypse and Genesis. The demons of Amenth severed Okkara into two independent islands. The island of Arakko was drawn to the shores of Amenth, while the island of Krakoa remained on Earth, as seen in Powers of X #4.

Believed to be lost forever in space after first fighting the X-Men, Krakoa turned up alive and well on the Stranger's laboratory world in the pages of Quasar #14-15. Krakoa returned to Earth under unrevealed circumstances prior to House of X #1, and served as a mutant homeland and nation-state in the Pacific. Another Krakoa operated as a secondary site in the Atlantic, but it was never clarified if this was the Jean Grey School's Krakoa "clone", or if the original Krakoa chose to segment its body. The Atlantic Krakoa was exiled to the White Hot Room after the Hellfire Gala massacre, and merged with Pacific Krakoa in Uncanny X-Men #700.