The seed would heal us yeah. Oh I know the snake juice isn't Dhar, I've seen that quote by the QM, I had quite a bit of fun digging through that info collection. I think its a really cool take on the whole idea of how the Warp works inside of warp entities.
The reason I have the issue with the Liber is because I frankly don't see it as doing the exact same thing. The matrix was taking a look at what was probably a lore of Necromancy or vampire lore spell, ripping all the Dhar requirements out and then making something out of that. Its a process of finding Spell X that works off Wind X and then adapting it to Ulgu, and this is basically the root of one wizard looking at another and going "Hmm, how do I do that?". Using the Liber Mortis to learn how to manipulate the snake juice with Ulgu is instead very similar to using Wind X on Material Y affected by another Wind Z to manipulate that Wind Z. That process I look askance at, because its like trying to paint blind. I don't want to go mucking about on a similar path of "enlightenment" to Nagash.
Also like, I... hmm. Like, I actually have less problems with your ideas because you specifically don't want to use anything related to Dhar and I've been doing you a disservice so for that I apologize. I still have problems though, and they relate to the Liber Mortis itself, which is that point blank I don't trust it to stop there, regardless of yours, mine or quite a few other sensible people's opinions. This has to do with any quest's structure, which is that outside of novelty quests with a tiny handful of readers the largest proportion of readers in a quest are those who read the updates and then look at the tally or scroll down to find the leading plan on the first page and then vote for that with very little actual interaction. Most folks don't have time to get in-depth in my experience, like we are right now. I'd really rather not have to deal with the fallout of reading it, learning some of the stuff in there and then someone who actually is interested in using Dhar throwing out a vote that grabs up enough of those folks to win and then there were are.
Or to put it another way, the Liber Mortis forms a chunk of narrative that weighs down the rest of it in directions I have active negative interest in and so I am championing positions that excise most of it from relevance beyond the idea that its a Cool Item she needs to Protect because if the darkness addled chucklefucks get ahold of it we got Problems. And gives BoneyM options of like, Oh It was Stolen! Time to get it back! for story arcs. Those are fun!
Now to poke at an implication, if you just want to read it and use that to improve her use of Ulgu then I'm like "Well okay" but see my meta textual reasoning.
As for the Journeymanlings I wasn't operating from the perspective of Mathilde just out going "Weee!" and using whatever. Studying it would involve tests and such. Its how she's done things so far. The problem is that its manipulating Winds outside her own with Ulgu. This is a thing that is not possible outside of Alchemy and probably a few other things. Not something the Grey should likely have access to inside the context of what the Journeymanlings know that Mathilde knows. Its also visible so... *open hands* yeah its preeeeetty iffy.
Ah, thanks for the clarification on Dhar.
I really genuinely don't see it as the same process. Like the most prominent example of, "Use Ulgu on the snake juice to make it cough up a mist of some other Wind that then does something" isn't taking a look at one spell fueled by Dhar and then taking the Dhar out and making that spell with Ulgu. Its indirectly manipulating another Wind, using a very similar line of thought to what Nagash did excepting the fact he was using a separate material in warpstone.
For me I just want to learn of Ulgu and figure out what can be done with deep mastery of the Wind of Shadows and Fog.
E: Like to clarify, I agree the reasoning of "Take this thing used for evil and make a good thing off the idea" is basically the same, but the end processes being proposed are not similar and are what I am objecting to.