He doesn't have a sword as he comes out of an extra dimensional prison, :shocking: So maybe it wasn't on him then, but why is a sword heirloom so difficult to accept? Like I said, Uriel has a sword on him in Oblivion. I guess I fail to see what the big deal is.
It's not that it's hard to believe; it's just that it just hasn't been hinted at anywhere. There is no reason at all to think it's true.
I could say that there are http://en.wikipedia.org/wiki/Wyvern in Summerset Isle. They would not be at all out of place in the setting, and there is nothing to prove they aren't there. However, nothing says they are, so the obvious answer is that for now, there aren't.
Uriel carries a sword in
Oblivion, but so do the Blades, a decent chunk of the Fighters' Guild, the entire Imperial Legion, every city guard, the Battlemages, the Dark Brotherhood, random Daedric cultists, random bandits and marauders, the Golden Saints, the Dark Seducers, the Knights of the Nine, pirates, the Knights of the Thorn, and dozens of random civilians. That don't evidence nothing.