The Immortal Storm is designed for use with the Dungeons and Dragons Immortal rules.  While the back says that it cannot be played without the D&D Basic, Expert, Companion, Masters and Immortal rules with a little work it can be adapted for use with AD&D 1^st or 2^nd edition.  This module will challenge characters of immortal levels.   Authored by Frank Mentzer.   It was published in 1986.

SYNOPSIS

"The Storm-stuff is not matter as we know it, and beyond Immortal control," the Hierarch sighs.  "I fear we are doomed."  It appeared only a few weeks ago--a swirling grey mass of incalculable size.  And in it's center, an eye.  A humanoid eye.  Now the storm threatens the very era of Immortal rule.  The growing maelstrom emits a message to the Hierarchs.  But what does it mean?  Can it help save this realm of existence?  Is there time to save this realm?