ADVERSARY

The Adversary was alluded to as a great threat in Uncanny X-Men (1st series) #184, and his presence felt in #187. He first appeared in #188, taking the form of Naze, which he held until #224. Adversary was originally destroyed in Uncanny X-Men (1st series) #227, but managed to reincarnate himself as Haven's 'fetus'. Therefore, he was technically behind the scenes for every Haven appearance up til he was reborn in X-Factor (1st series) #117.

Resurrection of Magneto #3 linked the Adversary with the Shadow King, Annihilation, First Fallen, le Bete Noir, and the Goblyn Force, marking them as a pantheon of related entities or different aspects of a single entity.