In this special issue, the X-Men, comprised of Cyclops, Gambit, Pixie, Storm and Dani Moonchild, team up with Ghost Rider against the Atahsaia.
From what I can gather from google, the Atahsaia is a demon from the mythos of the Zuni, a tribe of Native Americans in the south.
From – X-Men Vol. 3 #15.1
