Shardcast: The Oathpact and Desolations

I think the Barrier Storm was part of what keeps Odium in and Honor let the Heralds piggyback on it to trap the Fused.

It was probably always called the Everstorm since it was meant to keep things in forEver.  Tanavast knew it's name when he made the visions ~2,000 before present day and he's not very good at seeing the future. He knows it's name because he made it (he likes storms a lot).

It's possible that the Everstorm was created to enforce the deal that keeps Odium bound. We know it's a deal between Shards because Dalinar has enough connection to Honor's remnants to let Odium out of it (OB Ch. 57 Passion). Odium doesn't show up and talk to people on Roshar until after the Everstorm is brought over and at first he can only talk to people when the Everstorm is near them. A year later he has more freedom via Connection. 

By moving a piece of the Storm to Roshar's physical realm it forms the "bridge" that the Diagram mentioned (WoR Epigraph Ch. 89). The Fused are still confined to where the Everstorm is, but now it is also in the Physical Realm on Roshar where they can bodysnatch Singers. 

Could strong human souls go to the Barrier Storm? Could there be more truth to the Vorin afterlife than just the memory of the Heralds vs the Fused? 

15 hours ago, teknopathetic said:

Could strong human souls go to the Barrier Storm? Could there be more truth to the Vorin afterlife than just the memory of the Heralds vs the Fused? 

There is truth to the Vorin afterlife, but it seems more inline with Odium's plans for Roshar that he outlines in RoW Ch. 112

Quote

I need soldiers. For the true battle that is coming, not for one people or one miserable windswept continent. A battle of the gods. A battle for everything. Roshar is a training ground. 

Later in the chapter he says if he wins the contest he'll make Dalinar a Fused who will lead Odium's forces to other worlds.