I read this storyline when it was first published 20+ years ago, and it still holds up. The artwork is ok, better in some places than others, but it is the storyline itself that is fascinating. The saga begins after Dr. Strange has defeated one villain by destroying many of his own mystical objects, and thereby releasing into the universe an equally dangerous situation. And in order to fix this, he has to hook up with former villain Kaluu, and learn to make compromises with his own sense of purity, because without using the energies of black magic he cannot solve the crisis he created. In many ways, this story arc really opened up & evolved the concepts behind the idea and role of a "Sorcerer Supreme." The good doctor has to learn to examine the greater good versus the idea of never putting anyone in harm's way. In some ways the story is a little chilling, because it examines the very concepts of morality & integrity on a large scale. By the end of the tale, Dr. Strange has compromised many of his beliefs in order to repair the damage he created to the universe. Along the way, he is joined on his journey by temporary disciple Rintrah... all in all, one of the several story arcs that make Dr. Strange one of the more thought-provoking characters in the comics.