The first of many AvX stories started with Professor X on a solo mission to the center of the Earth to hunt down Lucifer, equipped only with a special wheelchair with tank treads…
…and quickly escalated to the X-Men fighting The Avengers because the Avengers wanted to help out.
But before the battle, The Avengers clear the area.
I like that they take the time to do that. Those kinds of details are one thing I really like about early Marvel.
We don’t know this yet, but Lucifer is actually an alien who caused Professor X to lose the ability to walk.
But we do know Lucifer dresses like Magneto.
X beats Lucifer in the end, of course. Once again, his mind abilities solve the problem–and that’s something he could have done from the get-go.