X-Force #25

The Starjammers take the X-Ternals to the world of the M'Kraan Crystal but when the Shi'ar who protect the crystal attack, Gambit and his pals find their way inside the giant gem (which they have been sent to steal). They meet Jahf, guardian of the M'Kraan, who explains the true nature of their quest and guides Gambit in stealing a shard of the crystal. As the X-Ternals prepare to return to Earth, Sunspot explodes from all of the energy he has absorbed in allowing Gambit to fulfill his mission.