X-Men: Asgardian Wars
Chris Claremont (Writer), Paul Smith and Arthur Adams (Artists)
Loki intends to win the favor of the greater gods "They Who Sit Above In Shadow", by ensuring peace everlasting on Earth. To do that he creates a magical fire fountain in a desolate part of Canada that gives people super powers according to their talents. Madelyne Pryor, Scott Summers and the scientists they were carrying on their plane are the first to be transformed by the fountain. The X-Men and Alpha Flight get involved in examining this. Unfortunately the gift is too good to be true as the fountain not only slowly kills all magic users, but also takes away the imagination and dreams of those it transforms.
Uncanny X-Men Annual #9, New Mutants Special Edition #1, X-Men and Alpha Flight #1-2