Board Thread:Lore Discussion/@comment-6702118-20140722142914/@comment-14027812-20140723000537

I leave for six hours and this thread gains kilometers of length.

Well, Alduin doesn't just parade around eating kalpas, I believe some sort of process is required to help him reach full power (something that he doesn't have in Skyrim). Furthermore, the Dragonborn is not a mere mortal, he's a Shezarrine, himself.