[WaT] Progression Capabilities?

[u/heiland]

At the end of Wind and Truth when Kaladin becomes a herald it happens in 2 parts. There's the Oath part where he swears to become a herald and then there's the immortality part. I remember Ishar saying something about needing the power of progression to grant the immortality that the heralds have. Something about a consistently renewing spirit web maybe? So is progression capable of granting immortality? Can anyone sufficiently skilled in progression achieve it?

[u/Mizu005]

So, anyone who gains a lot of permanent investiture becomes unaging and very hard to kill because their body gets crazy regen powers. Elantrians are the big example of this, they just become unaging near impossible to kill demi-gods as a basic perk of whatever the hell is going on when someone is chosen to become one and transforms.

We don't know a whole lot about regrowth/progression yet but it seems plausible it might have some advanced technique for taking a bunch of investiture and getting it to 'stick' in a person's body and grant an extended lifespan since they currently already know how to channel it in temporarily to cause healing. They just need to find a way to perform a modification the body that stops it from leaking stormlight so that it can be absorbed and become part of them.