Is there any method for a creature to destroy a soul, such that it is utterly wiped from the multiverse? No afterlife, no wall of the faithless etc etc

I was thinking about the nature of the multiverse and afterlives and it occurred to me that having an eternal soul is possible one of the worst fates possible.

When gods die what happens to souls that exist in their heavens, hells, planes etc?

I guess their either swooped up by whichever god killed them, left to rot in the corpse of a dead deity or float around the astral sea until they eventually reach the fugue plane and join the wall / go insane.

So one could probably say there is a good chance that every soul that ever lived will eventually be abandoned / end up on the wall. And likely in between that time their souls will be juggled around by random gods being put in whatever heaven or hells in between.

If my character realised such an eventuality, or at least believed in it, what method could they take to ensure the destruction of their soul?

Is there any method for a creature to destroy a soul, such that it is utterly wiped from the multiverse? No afterlife, no wall of the faithless etc etc

I was thinking about the nature of the multiverse and afterlives and it occurred to me that having an eternal soul is possibly one of the worst fates possible.

When gods die what happens to souls that exist in their heavens, hells, planes etc?

I guess their either swooped up by whichever god killed them, left to rot in the corpse of a dead deity or float around the astral sea until they eventually reach the fugue plane and join the wall / go insane.

So one could probably say there is a good chance that every soul that ever lived will eventually be abandoned / end up on the wall. And likely in between that time their souls will be juggled around by random gods being put in whatever heaven or hells in between.

If my character realised such an eventuality, or at least believed in it, what method could they take to ensure the destruction of their soul?