When worlds collide
The Miasma is the interface between mortal reality and the Godspace, the plane on which the Gods reside. Mortals find it difficult to linger here, enduring great pain. Mortal translocation magic uses the Miasma as its transitional space, thus causing such spells to be used only when required, due to the associated pain. Extended stays in the Miasma can lead to serious side effects, including insanity.