Summary by Robert Diehl. Thanks!:
Writer: Chris Claremont
Pencils: Jackson Guice
Inks: P. Craig Russell
Letterer: L. Lois Buhalis, Tom Orzechowski
Colorist: Glynis Oliver
Editor: Ann Nocenti
Editor in Chief: Jim Shooter

Synopsis:

"Ashes of the Heart"

(Feb. 1987, 22 pages)

Using Illyana's transporting power to flee from Magus, the New Mutants are separated in space and time. Rahne, Roberto, Amara, and Shan wind up in Westchester in the future (Earth 8720 - similar to Days of Future Past) and are set upon by Sentinels. The future Sam and Dani come to their rescue and then describe to them how the Sentinels killed mutants and then superheroes, except for the ones evacuated to Lila's Dyson sphere.

In the present, Magneto uses widget devices to tidy up the estate, preparing for when the New Mutants return. (He thinks they died when a plasma bolt wiped clean the Morlock tunnels: Thor 374).

In the future, the Sentinels capture Lila, so the mutants go to her rescue, fighting in a ruined Manhattan, finally freeing her.

Lila, Sam, and Dani escape to the Dyson sphere, leaving the rest behind to wait for Illyana to show up. Amara makes a volcano out of the Sentinel's Manhattan.