She has nothing. She has no resource to accomplish this other than her own blood. And this is dangerous. Blood magic is, by itself, dangerous. Add a (possibly) Tainted Eluvian, the advices of a Pride Demon, and a paper thin Veil and it's a disaster waiting to happen. Go to the Circle, go to the Grey Wardens, go to Tevinter if you have to, anything!
I would argue that blood magic by itself is not dangerous. I believe that blood magic, because it's so powerful a tool in the way it augments already existing powers, becomes easy to abuse, and it's ability to influence the minds of others makes it doubly more dangerous in the wrong hands, and must be kept an eye on, limited and illegal in most cases.
But it does make a perfect substitute when lyrium is in short supply, if the it's only being used to augment already existing magic, so long as the mage uses only their own blood and doesn't kill anyone else.
If you believe that blood magic is dangerous by itself, then you are in essence arguing against the templars using phylacteries, which is a form of blood magic.
Which means YOU DON"T KNOW. You are leaping to the conclusion that the mirrors are inherently tainted even though the available evidence strongly suggests otherwise.
No, I am presenting the possibility that they are based on strong evidence that suggests it.
Between the two of you, I think you're both being kind of dismissive towards each other, but let's look at ALL the evidence on the table, and maybe some you both overlooked.
History of the Eluvians, simple, factual knowledge, based on my limited understanding.
1. The eluvians were created by the ancient Arlathan elves.
2. After Arlathan fell, the Tevinter Imperium took them, and despite their extensive knowledge of blood magic, all they got out of them were fancy telephones, which they used for long range, speedy communications.
3. Duncan mistakenly believes them to be Tevinter artifacts, but does confirm that the Taint can focus in on them, and proceeds to destroy it for safety...a measure that doesn't actually work in the end.
4. Tamlen and Mahariel discover the eluvian, and Tamlen sees an underground city and something looking right at him, and he lost all ability to look away. An explosion of light separates Mahariel form Tamlen, and both are tainted. If we play the Dalish Origin, Tamlen is later discovered as a shriek.
5. Morrigan steals a book on eluvians from a dalish tribe and activates hers through great effort, turning it into a portal that led to a place beyond the Fade, and it was a place she felt safe enough to travel to keep her son as well as hide from Flemeth.
6. Through Finn, we learn that all eluvians are interconnected (although we could've pieced that together as they worked as communication devices.) Using the lights of Arlathan to break through the darkspawn taint, we can track Morrigan. Speaking of the darkspawn taint, despite Duncan breaking the eluvian, it still corrupts elves investigating the ruins, turning them into ghouls, therefore his safety measure of breaking the eluvians didn't work.
7. Merrill takes a piece of the shard from the broken eluvian, keeps it isolated and never gets tainted, having used blood magic to cleanse it of the taint.
8. Having studied lore extensively and extrapolating information from the shard, Merrill builds a new eluvian, but lacked the knowledge to activate it.
That's all the evidence that exists about eluvians to date. The tevinters used them as communication devices, they can attract darkspawn taint, Tamlen saw an underground city in a dark place, with something looking right at it (likely the Archdemon, but that's pure speculation on my part.)
Based on that evidence alone, I would say that Merrill is more in the right than Merethari, who refused to study eluvians at all, dismissing them as something their ancestors wanted abandoned.
Simply my opinion, but I see more evidence that eluvians are quite harmless than harmful.
Research involves controlled risk. The scientists who first harnessed nuclear energy died of radiation poisoning but they didn't perform their tests in a garage in the middle of New York City.
I believe Merrill saying going to the demon as a last resort, bringing the Champion of Kirkwall to kill her should things go amiss
is controlled risk.
Merethari ran up and released a demon, allowing it to possess her without any precautions or warning to the clan she was leading. There is no control there at all.
So, basically, because you don't like Andrastianism, you can't accept when followers of the religion do something right. what Wilhelm did is no different than what that Rivaini Enchanter from the Desire Demon Codex Entry was doing.
I asked you to show me where religious dogma was negativelly affecting their research of the Fade, you couldn't or wouldn't do it. Now, I ask you to show me how these sources are flawed. Will you do it?
Andralla could have very well been both. Who's jumping to conclusions now?
She was not a blood mage tough, the codex is very specific on that point. She herself never used blood magic.
One doesn't need to like or dislike Andrastianism to recognize the Fade is ever changing according to the observer and the will of the demons/spirits who dwell there.
The codex entry on the Fade mentions that Tevinter tried to map the Fade once, only to find that every time they went there, the spirits and demons had altered it in cheap imitations of reality that they saw in dreamers.
The Fade is a realm of dreams. Everyone from Kings and Queens to peasants and templars go there to dream. Not just mages. Mages are separated from the others based on their ability to enter conscious. The only thing in the Fade that's real is the power of one's will. The rat, the demon, heck, maybe even a piece of furniture, may be a spirit or a demon in disguise.
Valor in the mage origin laments that non-mages must lead empty and hollow lives because they can't will things into being.
As for evidence that the Chantry and templars restrict study of demons and the Fade, why that can be found in the codex entry for the school of spirit. Wilhelm's journal also makes it clear that he can't study demons. Avernus comments that its men, not the Maker or the Chant of Light, that forbid true magical research.
(Don't take that as approval for
how they did what they did, but more as acknowledgement that they may have a point.)
The School of Spirit is often mistaken for blood magic because that school
specifically studies the fade, and the spirits who dwell there. A spirit-mage's connection to the Fade makes them overpowered tempalrs with their spells. But it's limited because it's almost inter-changable with blood magic, such as the summoning of the dead. The Spirit Healer codex says that spirit healers are the most useful mages because they're needed in times of peace and war, but are actually one of the most feared because they have such close connections to the Fade by dealigh with spirits of Faith.
No, I am not, she dismisses the Chantry's separation of demons into different sins. Instead, she says spirits are different but only so much as Hawke and Isabella are different and that the Fade is no more foreign than Orzammar.
Which, of course, is ridiculous. Mortals and Spirits are tremendously different in their emotional range and their way of reacting to stimulus.
I would respectfully disagree. Let's put it into another context.
A demons and spirits dwell in the Fade, and they can will whatever they wish into reality. Spirits and demons who get sundered from the Fade find themselves in a world where everything they have known, everything they may be used to, simply don't apply. Powerful demons may summon other demons, but a rage or hunger demon is stuck being angry at everything for no reason or hungering for everything without end, but unable to will something to fight or eat. They react rashly, latching on to the first things they can. Sylvans are possessed trees, shades are possessed dead, and plenty of other examples exist outside of mage abominations.
What separates spirits and demons is that demons are interested in the mortal world and want to experience it, while most
benevolent spirits couldn't care less. Justice being an example. Not a demon, and panicked when he realized he wasn't in the Fade, but still tried to stay true to the ideal he wanted to live up to, that being Justice. He ended up a force of Vengeance, the darker side of Justice, and may have been considered a demon himself simply because of his new interest in the mortal world and bringing
justice to all who had been wronged....particularly mages after his joining with Anders.
We have two example of two sloth demons, if you play the mage origin. One is the sloth demon in the Harrowing, and he could barely be bothered to aid the Warden, save for some amusing diversion, or the temptations of a meal and seeing the mortal world through the mages eyes, but barely mustered up the energy to do so. The Sloth demon in Broken Circle was FAR more active, using its powers to make US slothful and tired. The same kind of demon, but with far different personalities.
Say you have two mages in front of you, two rogues in front of you, and two warriors in front of you. You can get a good idea what to expect they can or can't do based on those descriptions alone. But you can't tell how they'll use their power/ability, or what they'll actually do. Shield/sword or two handed weapons for warrior? Primal power, healer, blood magic, shape-shifting mage? Is the rogue a very quick fighter or a thief and lockpick, with skill with a bow?
I think the difference between Audacity and the pride demon in Asunder (not the book, but the quest in the deep roads in Origins) are very different personalities. Audacity was sealed away, whereas the Pride Demon in the deep roads willingly allowed itself to be torn asunder as a convenient way to lay low, and pretty much told the Warden they could fight or get a reward. Audacity, based on the little information we have, didn't offer battle or reward, but relied more on deception and was far more subtle.
Same kinds of demons, completely different personalities.