yes i know that damn diamond, where did the dragons come from? the ones attacking skyrim? akavir is the dragon land...
There are [censored] dragons in Tamriel, it just that we have yet to see them since Redguard, presumably because they are in hiding, and the emperors haven't called them for aid since Tiber Septim.
And Akavir only have 1 dragon. 1. Tok Rasha.
As for those who are wondering what the dragonborn is, it's the line of Alessia, not Tiber. The line of Alessia went: Alessia --> Reman --> Tiber, all three of whom started the three empires. This fourth is most likely going to be the 4th of the line of Alessia.