Hello everyone! Long time lurker, first time poster. Love these forums. I have a theory that I think hasn't been considered yet by the 17th sharders here yet. What if the Sibling that the Stormfather mentions is a spren from adonalsium itself? I think that the three godspren that the bondsmiths bond to are NOT related to Odium whatsoever, because why would a spren that represents Odium as a god want to work with the Knights Radiant? We know that the original spren of Roshar came from adonalsium, and that the Singers predate the humans and may have predated Honor and Cultivation on Roshar. Who did they worship before Honor and Cultivation? We know that the original rhythms are related to the spiritual realm directly. So perhaps they worshipped adonalsium itself? We also know that Ash swears in Adonalsium's name during the battle of Thaylen City, so the heralds at least know of Adonalsium as well. So I believe that the third godspren represents a god, but not Odium. Adonalsium.