User blog comment:Inferno Pendragon/Afterlives, Immortals and Omniverse Paradoxes/@comment-1591389-20160101152112/@comment-1070010-20160102212635

Perhaps all souls unclaimed by higher powers are taken by Miasma and used in the creation of new universes.

In The Book of Miasma, Abysm is referenced as "the insidious, eldritch darkness that seeps through the cracks of the fragmented multiverse," so having Abysm function similarly to the Greek concept of Chaos works perfectly.