**Minor stormlight and elantris spoilers below**
Say someone with access to the transformation surge travels to Sel. Do you think they'd be able to soulcast? Since the cognitive realm is really dangerous, would it even be possible? Could spren even follow their radiant there? If not there's still Honorblades, could they soulcast? Since soulcasting, at least for Shallan involved going into Shadesmar.
Im not sure if I remember this correctly, but I think that windrunners have a little protection against the air friction and other natural stuff that could hurt them, so maybe Elsecallers or Lightweavers (more likely Elsecallers) might have extra protection in shadesmar.
And if Elsecallers DO have extra protection in the cognitive realm, could one of them be able to put Dominion and Devotion back together?
Any thoughts? Is there not enough information? Or am I just completely wrong?