It took me a while to get my head around this faction, but I think that's a good thing! You've developed something that really goes "off script" of a typical Root faction. I think "Knowledge Devotion" is a really interesting way to do the reverse of the Woodland's "Guerrilla War", where you actually want others to deal more hits to you (to a certain extent). The Omens really change up the traditional battle mechanics, which could help or hurt someone's plans!
Is the "Oracle" an old name for the Prophet? I saw it mentioned in the faction setup (step 1), but didn't see it anywhere else on the board.
Also, are there any rules on how to choose new Omens? Does a player need to cycle through all the Omens before they can be used again, or can discarded Fulfilled Omens be chosen again right away?