I don't know - given the translation of the Sperethiel name for Crater Lake ('skull of the dragon') blood magic aspecting at that site seems unlikely. I'm not saying you're wrong, Nath - probably there's a general lack of information.
Remember the excerpt I quoted. The most common dragons in Americas are feathered serpents, and feathered serpents practiced blood magic in the past.
There is
another theory regarding that name I also considered, however.
Well, what gets me about her is that in the immortals' chats Hecate (Blavatska, AFAIK) asks about things Alachia would or does know about.
Aztlan suggests "Hecate" knows an ancient language, may be involved a down-cycle hunting of dragons, knows about "Wordsmyth" and "The Laughing Man" personal feud, is older than "Lady of the Court" and old enough to have "experienced personally" Corruption (with one big C), was around at the time of the Great Ghost Dance, has an history of "consorting with the abhorrent" as The Laughing Man put (context suggests blood magic) and finally knows about the original intent behind the creation of Locus.
There is also seem to be some sort of connection with "watchers" whatever they are. When the conversation starts, page 11, Wordsmyth asks "Is the Watcher attending to this?" to which Umsondo replies "I am here." The singular suggests there ought to be only one around (wile Hecate is already online). But later, when discussing the possibility that Domingo Ramos could be "Gifted", The Laughing Man comments "His behavior says he ought to be. Another Watcher?" Umsondo replies "No." and then Hecate continues "Laughing Man insults us!"
Us ?
Loose Alliances, page 79, strongly implies Hecate is Sheila Blatavska.
Dawn of the Artifacts: Midnight, page 8, states Sheila Blatavska gave their Codex to the founders of the Mystic Crusaders. It suggests she is Samriel's boss in the ending short stories, page 56. That woman knows about the artifacts, calls Jane Foster a "child" and considers telling the "
Caynreth’im" of blood mages activity to "keep them occupied" (In
Earthdawn, Caynreth was the first Great Elve created by the Great Dragon Alamais).
If Samriel's boos is going to play a significant role in
Dawn of the Artifacts fourth chapter or
Artifacts Unbound, I would hope the Hecate/Blatavska/Alachia thing has been decided for good.