M'Kraan Crystal

In the fictional Marvel Comics Universe, the M'Kraan Crystal is an artifact that lies at the nexus of all realities. It is associated with the Shi'ar alien race. It plays a prominent role in several major storylines, including the Phoenix Saga and the Age of Apocalypse. As it a singleton across all universes, the reality-hopping Exiles have recently figured out how to use it to visit selected realities.

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