Halo City was built by Doom to act as a refuge for the Theatre of Pain's victims, with his Black Cabinet member, Morphine Somers, acting as governor. The X-Men became its guard, called the Protectorate. Halo City was flooded during a global cataclysm.
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- Appearances of Halo City
- Minor Appearances of Halo City
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- Location Gallery: Halo City
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