New Mutants #26
New Mutants #27
New Mutants #28

Read Muir Island Saga here.

Read Age of Apocalypse here. Only the Legion Quest prelude event is necessary, reading the rest of Age of Apocalypse is optional.

New Mutants Vol. 3 #1 (2009)
New Mutants Vol. 3 #2
New Mutants Vol. 3 #3
New Mutants Vol. 3 #4
New Mutants Vol. 3 #5

Read Age of X here.

X-Men: Legacy #250
X-Men: Legacy #251
X-Men: Legacy #252
X-Men: Legacy #253

X-Men: Legacy Vol. 2 #1 (2013)
X-Men: Legacy Vol. 2 #2
X-Men: Legacy Vol. 2 #3
X-Men: Legacy Vol. 2 #4
X-Men: Legacy Vol. 2 #5
X-Men: Legacy Vol. 2 #6
X-Men: Legacy Vol. 2 #7
X-Men: Legacy Vol. 2 #8
X-Men: Legacy Vol. 2 #9
X-Men: Legacy Vol. 2 #10
X-Men: Legacy Vol. 2 #11
X-Men: Legacy Vol. 2 #12
X-Men: Legacy Vol. 2 #13
X-Men: Legacy Vol. 2 #14
X-Men: Legacy Vol. 2 #15
X-Men: Legacy Vol. 2 #16
X-Men: Legacy Vol. 2 #17
X-Men: Legacy Vol. 2 #18
X-Men: Legacy Vol. 2 #19
X-Men: Legacy Vol. 2 #20
X-Men: Legacy Vol. 2 #21
X-Men: Legacy Vol. 2 #22
X-Men: Legacy Vol. 2 #23
X-Men: Legacy Vol. 2 #24

Legion #1 (2018)
Legion #2
Legion #3
Legion #4
Legion #5

Uncanny X-Men Vol. 5 #1 (2019)
Uncanny X-Men Vol. 5 #2
Uncanny X-Men Vol. 5 #3
Uncanny X-Men Vol. 5 #4
Uncanny X-Men Vol. 5 #5
Uncanny X-Men Vol. 5 #6
Uncanny X-Men Vol. 5 #7
Uncanny X-Men Vol. 5 #8
Uncanny X-Men Vol. 5 #9
Uncanny X-Men Vol. 5 #10

Age of X-Man: Prisoner X #1 (2019)
Age of X-Man: Prisoner X #2
Age of X-Man: Prisoner X #3
Age of X-Man: Prisoner X #4
Age of X-Man: Prisoner X #5

Age of X-Man Omega #1 (2019)

Way of X #1 (2021)
Way of X #2
Way of X #3
Way of X #4
Way of X #5

X-Men: Onslaught Revelation #1 (2021)

Legion of X #1 (2022)
Legion of X #2
Legion of X #3
Legion of X #4
Legion of X #5
Legion of X #6
Legion of X #7
Legion of X #8
Legion of X #9
Legion of X #10

X-Men: Before the Fall: Sons of X #1 (2023)