Conversation so far:
What is Marvel Comics' Legion Quest?
Legion Quest is a six-part Marvel Comics crossover event involving the X-Men, published in 1994-1995. It was a prelude to the Age of Apocalypse extended storyline.
What is Marvel Comics' Age of Apocalypse?
Age of Apocalypse is a 1995 comic book crossover storyline published in the X-Men franchise of books by Marvel Comics.
Who is Magneto?
Magneto is a fictional character appearing in American comic books published by Marvel Comics, commonly in association with the X-Men.
How were Magneto and Charles Xavier opponents?
After facing Baron Strucker and Hydra, Erik, realizing that his and Xavier's views were incompatible, left with a cache of hidden Nazi gold.
Are there any other interesting aspects about this article on Marvel Comics' Legion other than Legion Quest, Age of Apocalypse, Magneto and Charles Xavier?
The television series Legion premiered on FX network in 2017.

Question: How did they travel back in time?
Self-contained rewrite: How did Marvel Comics' Bishop travel back in time during Age of Apocalypse?