Spider-Man teams up with Dr. Strange to prevent the evil wizard Xandu from swiping Strange’s magic wand (the Wand of Watoomb).
Spidey gets mind controlled.
Creators: Len Wein and Sal Buscema, the team working on The Defenders, where Dr. Strange gets to be the boss of a team.
For the complete history of the MU, year by year, go here.