: This May sound absolutely insane but here goes. The
: 'Mahir' was a Heron Gaurd who died and has swore to
: defend the entrance.
I rather like this theory. The Cath Bruig seal the entrance to this library/tomb, and one brave Heron Guard, protector of the empire, sacrifices his life in some sort of necromantic ritual and his spirit was bound to the place. That would explain why he didn't attack the narrator: because the guardian recognized him as a fellow Guard.
: Now Their may be two kinds of Mahir, Wind and Fire.
I don't think "fire" is the best desciption of the mahirs we see in m2, since they're completely black and shadowy. Maybe "dark" and "light" would be better terms for the mahir flavors?