I’m nodding along to all that, but there’s one bit you didn’t bring up - after his investigations into the Black Waste he wrote the hot chocolate recipe but had a small comment about how he was concerned about the scar that wasn’t healing (and how Siobhan instinctively knew he wasn’t talking about a physical scar). I don’t have the actual quote to hand, but I’ve been mulling over that for a while. I think there was a bit about how he’d accidentally locked himself out of his own wards around that point as well, which is also “haha, how silly” on the surface, but could potentially be quite sinister under the hood.
I think Siobhan’s mind has scars - not just from what Lacer did, but what her grandfather did.
I don’t want to draw conclusions just yet, but I’m just throwing out things that have occurred to me. Things like we don’t know when Myrddin developed dual casting - just because the books were protected that way at the end of his life doesn’t necessarily mean they were originally protected that way.
Other thoughts percolating include Lacer mentioning that magic has no limits, except those that people impose on themselves.
So theoretically, it’s only a question of imagination and power.
But we also know people impose many limits on themselves (which, for example, stops them from freecasting).
Lacer seems to believe that dual casting is impossible. Is it impossible because of a self imposed limit? Perhaps it can begin naturally enough but the more extreme versions involve pushing yourself to the absolute limits of what a human can compute?
Anyway, back to Siobhan and the mind wipe - she’s been practicing the refinement of the nine heavens which gives her some protection - possibly more than Lacer would imagine, given that she’s suddenly developed a deep understanding of transmogrification and is probably pulling on the ideas of all the grandmasters who have truly mastered the craft. She’s got her will backing up her memories and she also has the memory that is sealed away and untouched, that holds the creature within her in check. There’s nothing to say that just because she can’t access the memory it can’t continue to function as a…a backup memory of sorts. Pure speculation, of course, but sleep is when the brain processes what happened during the day and creates long term memories. If that’s the point where the barriers between her mind and her sealed memories are at their most permeable (allowing the creature to torment her with nightmares) then perhaps that’s when it’s been “backing up” her man memories, so to speak.
It might also be why the creature can communicate with her so openly, if her brain is always in that state of rest and rejuvenation. It might have avoided sending her waking nightmares in hopes of the seal failing, or possibly because it’s so starved for stimulation being locked up all the time that now it gets to see more of the world.
I’m still intrigued by the raven dream she saw and what that betokens.