Uncanny X-Men #106: The Dumbest Flashback

Back on Earth right after they all left, Xavier reminisces about that time that he almost killed all the X-Men in the Danger Room cause he was having a psychic seizure related to his connection to Lilandra back when he though he was just going insane.

He summoned mental projections of all the original X-Men minus Cyclops to beat the hell out of them and mock them as not good enough. In the end, it all amounts to nothing, but apparently there is Xavier's "dark side" the Entity.

X-Tra Notes: So this was actually released due to some outside circumstances and not intended to be the next comic, that is why it feels so weirdly placed. It was originally written by Bill Mantlo and drawn by Bobby Brown as a backup in case of deadline issues so that X-Men wouldn't miss a comic. Bobby Brown had died earlier in the year, so they released this comic. Claremont and Cockrum did create the opening and closing to loosely tie it in to the current storyline.