If I ever get the opportunity to actually run Mythic Bastionland, this is for sure on my list. Engaging myth that feels equally at home with appendix n and the core myths.
I saw you clarified the use of Encounters in the comments below, but I’d recommend either moving it after the omens or if you had the room explaining how to use the encounters. Especially because, from my understanding, the only “random” encounters as written in MB are Omens, a Hex’s landmark, and Knights (though there isn’t a specific trigger for the latter outside their omen.)