Board Thread:Lore Discussion/@comment-8248675-20130812183045/@comment-24614548-20140302010116

The only reason that the blood of Tiber Septim counts as a part of a Divine is because he was Dragonborn. The Dragonborn possesses the blood of dragons. The dragons are the divine creations of Akatosh. So that piece of divinity used in the ritual was a part of Akatosh, not Talos. So no... Talos isn't an actual Divine. He was a man who was treated like a Divine.