
So far as we know it’s only the ala mihgo, but I could say she’s part of a tribe of raen who live in another part of hydaelyn who fight with griffins, as we saw in the Azim steppe, the Xaela/raen fight with the Vol. Why can’t the griffin riding be known by others some where else? Hydaelyn has been around for a long time so other people could learn and there are a lot of unexplored areas.