Convinced by Mole of the cause, Magma causes an undersea volcano to erupt, weaking Krakoa and knocking out everyone near Nanny Cove, allowing Sabretooth to escape and move without witnesses. He had no intention of helping his comrades escape with him.
Mystique and Destiny catch up to him. But Destiny sees a vision of Sabes leading an army of Exiles, and says to Mystique that he could do the right thing and save a lot of lives. So they let him go.
He steals Bling!'s boat and rides off. However, Orchis manages to get ahold of him, and are planning on throwing him in with their new mutant prison program.
Meanwhile, Cypher says that Sabretooth left his throne in the Pit. He can't let anyone sit on it and make Krakoa a Hell like Sabretooth did. So everyone, including Nanny, Orphan-Maker, Toad and Hellion, are brought to the surface. They're given a mission to wrangle Sabretooth in by throwing some weird skull thing at his feet. What it will do, we don't know. But it's apparently worse than death.
Xavier, meanwhile, has lost the faith of some Krakoans. People know what he did and his reputation is tarnished. No outright rebellion yet though. Maybe next LaValle book.