: I think it's Heron Guard Standard(symbol of Muirthemne).
: We also can see the same image in Total Codex. I think
: that Total Codex was artifact that always was in
: Muirthemne, that's why he had symbol of Muirthemne.
: And than when Muirthemne was sacked by Balor, the
: light army went to retrive it and guarded it in Great
: Library(Covenant). Than Watcher take the city and
: Rabican send troops to retrive it one more time.
Actually it's not the same symbol on te cover of the Codex. If you look at them both they're really quite dissimilar except for the curvyness. Therefor I doubt that they're connected in anyway except prehaps that the Smiths might have made the Codex. I think it's been in that library for a while…
-Disc