Inhabitants of the northern areas of the mass of lava speak about seeing a giant plume of black ash taking to the skies,
but instead of it being like a cloud or disruption that they may be used to, it dispersed into a mix of black mist and
winged creatures. Before long the entire mass was gone, and when they dared to travel close to the lava fields, they
found that a large section had been turned into what they now call the Ash Plains.
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Partly an experiment to see how folks would feel about a change to the lava up there. A big section has been WE'd out,
though ICly it can be expected that Strange might've had something to do with it, for whatever reason he may have.