: An interesting thing occurred to me while discussing an
: upcoming project. The Griffons were planned to be
: included in Myth 1 as airborn allies of the fir'Bolg
: who rarely interfered in the affairs of
: ground-dwellers. So they live in the air, and are
: friends of the fir'Bolg. Now, who are the enemies of
: the fir'Bolg? The bre'Unor, of course. And where does
: their god live? In the air!
I think that the Griffons were the fir'Bolg's allies against the civilized nations. When the fir'Bolg allied with the civilized nations against Balor, the Griffons felt betrayed and went into hiding.