The X-Men battled Freedom Force and the Adversary in Dallas, and in a televised battle, sacrificed themselves to allow Forge to bind the Adversary. Roma secretly restored them to life, and gave Betsy the Siege Perilous, an extradimensional teleportation device, which they could use if they ever wanted to start new lives.
Uncanny X-Men #250–251 (1989): The X-Men moved to the Reavers' Australian Outback base, from where they took on the Brood Boys, Genoshan Magistrates, M Squad, Mr. Jip, the Serpent Society, the Abomination, Master Mold, Nimrod, Nanny, the Orphan-Maker, Zaladane and the Savage Land Mutates. As they were about to depart the Savage Land, Betsy had a precognitive flash of the Reavers killing the team. To prevent this, she sent them through the Siege Perilous.
Next segment, new body, new skills.....