Twilight Cage

The Twilight Zone is an alternate zone comprised of vast barren wastelands, darkness and space, where time flow is roughly one quarter the speed of Mobius Prime's. When the Dark Legion began their attacks on Echidnaopolis, the current Guardian of the time, Steppenwolf, used his vast knowledge of Chaos energies to banish Menniker and the rest of the Dark Legion to the Twilight Zone. There the Dark Legion continued to live for centuries, periodically making brief escapes only to be returned to the confines of the zone. When Dr. Ivo Robotnik fired the Ultimate Annihilator, the weapon weakened the dimensional barriers, allowed the Dark Legion to escape once and for all. (StH: #50, KtE: #1, #2, #3, #17, #18)

Years later, the surviving members of the Brotherhood of Guardians and Moritori Rex were dumped in the Twilight Zone by Dr. Finitevus once he had completed his studies of them. (StH: #183)