These stories diverge from the main Marvel timeline right after the
story arc Rage Against the Machine.
#141 - Time and
Again (In the Shadows part
1)
#142 - Something
Sinister This Way Comes . . . (In
the Shadows part 2)
#143 - To Be, Or
Not To Be A Paradox (In the
Shadows part 3)
Uncanny X-Men #½ - The Dream (The X Remix prologue)
Uncanny X-Men #372 - The Nightmare of Reality
(The X Remix Part One)
X-Men #92 - A Shattered Team (The X Remix Part Two)
Uncanny X-Men #373 - Cry Havok (The X Remix Part Three)
X-Men #93 - New Dawn (The X
Remix Part Four)
Uncanny X-Men #374 - The Fire of the Phoenix
(The X Remix Part Five)
Wolverine #144 - Endings and Beginnings (The X Remix epilogue)
X-Men #94 - Cold Reunions
If you want to help me write the next story arc involving the Twelve saga
and the resolution of several plotlines, click here.
You can write any X-Men series as part of a crossover (except for Uncanny X-Men
and X-Force, as both of those are taken).