SPOILER WARNING: This article contains spoilers for "Uncanny X-Men" #13, which is on sale now.
Exodus' arrival also means that the spoilery -- and previously unseen -- cover for next month's "Uncanny X-Men" #14 can finally be revealed.
Introduced in 1993's "X-Factor" #92, the 900-year-old mutant Bennet du Paris first crossed paths with the X-Men during his tenure as Magneto's most powerful follower and commander of the Acolytes. The guy has almost limitless psionic power, including telekinesis and telepathy, and is also a teleporter. He also has energy blasts, healing abilities and use his telekinesis to perform remarkable feats of strength. Exodus is a major threat.
The last time we saw him, however, was exactly two years and four days ago in 2014's "Uncanny X-Men" #26. That issue saw him die at the hands of an even more powerful mutant: Matthew Malloy.
Of course that story ended with another X-Man -- Tempus -- traveling back in time to prevent Malloy from ever being born. While Exodus' fate was not mentioned at the time and he hasn't been seen since, it was safe to assume that he had not died since his murderer had ceased to ever exist. Now Exodus is back, and with his appearance in 2014 erased from continuity, that means the X-Men haven't tangled with this former acolyte of Magneto's since "X-Men Legacy" #263 way back in 2012.
"Uncanny X-Men" #14 -- the cover for which you can see above -- arrives in stores on October 5.