It implies that Necromancy is not innately Black Magic as we'd been led to believe.  Id always considered that one one of the more simlistic Laws since it was more banning a qualitative Energy rather than an Act; it banned the Method rather than the motivation.  Id taken it to mean that Necromancy was in itself a Black Magic energy that innately Tainted you (comparable to say Outsiders), and that eventually he'd pay some Price for Sue

Sir Stuart explained it I think. Ghosts and other spirits are not supposed to pierce the veil to manifest or otherwise directly effect mortals... I think part of that is that mortal choice/fate thing. But a necromancer is empowering things that go directly against that on both accounts, bringing it back through and giving it a direct tie to his own mortal magic, the ability to effect fate. Remember it's always kept alive by said summoner just like binders men. They're enabled. *we know piercing the veil gives direct negative effects to said spirits, why wouldn't it contaminate those whom they are literally connected to?
Slight tangent, I think this goes also into the positive/negative aspect of the spiritual plain. With things like the fae possessing enough pull here to mantle a host without disagreeing with said law or simply to cross over of their own will. Something not everything can do.

Yup.  Kusanagi, which per the ghosts in GS is another name for Fidelacchius, is a myth that long predates the Crucifixion. I personally think that the only thing special about Ammorachius in terms of a reforging that Merlin did something to make it a far more durable container for the Sword-mantle than it had previously been able to find/manifest.

... Random thought, but I've ran down the are angels equivalent to outsiders path as well as noting the swords are vulnerable on the island and had the errant thought that the 'forging of Excalibur' in this instance could have been the release of a deity/angelic source from the island that shouldn't have been trapped there or was otherwise changed by a new host/release of Grace from host...
Huh, the British guy is the source of love lol? No, I doubt it but still, The angel/outsider connection when considering the forging came up with that^^ Also... it was the Sword of love wielder that was harmed there, someone trying to call out and wrest power from where it's been placed caused a hiccup in said power? O.o

I like that line of thought there Q,

The shadows in the DF don't work precisely the same but there are certainly a shadow motif in the background of aspects of it. I think the 'shadow system' you refer to in Amber was largely overhauled into something to do with starborn and those who walk the 'paths' of said things.

That was my image as well, but admittedly I defaulted there because that's how the Animorph books I read as a kid explained it (I think they called it Z-space or something).

Same reason lol. But considering how ways work on resonance with the opener and the ability to create personal sanctums on the other side seen from typical ghosts to Lea's garden it seems a reasonable hypotheses.
Also Z-space was based off of early science into 'warp drive', but it's becoming more applicable now.

I would not immediately disagree, however Woj that most Mantles have been around since the beginning complicates things a bit if you don't consider the source of said mantles, specifically those whose source is known, are directly broken down pieces of the Mothers greater power.
Their are a few ways to attempt to broach and reconcile the subject though, mostly dependent on some leveraging of facts vs theory....
First if you consider woj angels are too... and I forget the precise wording now but whole for Nemesis to mess with, with the idea Angels are Celestial stars and we are on the star 'Gaia' in a cabbalistic manor, giving us a direct shadow of our own reality and then point out MW and indeed the broken down portions in the Queen and Lady are brought inside reality in order to create a balance, which takes it away from our Dark Star/Planetoid.(astrologically and scientifically named Nemesis...)  Then consider what Nemesis CAN mess with has consistently been mantles that exist inside our Star and source directly from the alloy of balance between and you could say all the mantles we know of are broken down pieces of the identity of our own reality/star made manifest genus loci style. And certain angels we have seen are those who came from the stars to earth and formed a true avatar or otherwise overwrote the star via starborn effect, becoming it in truth. (Hence Uriel's dual existence and ability to transubstantiate, as his own self)

Or.. We could take the "mantle of power" literally and point out every being we know of that is a Mantle is also... while not necessarily not the original being, as Cat Sith is, But Not an original representation for said power, or holder of said positioning.(some divergence here from Eldest Mantles to every other Mantle, Eldest Mantles imo apply the 9 psyche's of the consciousness and disperse them, giving that mythical shadow/devil inside us all a barrier between it and the queens, which are just another barrier of course) So those things sacrificed or otherwise killed that are connected to reality become positions of power, where-in the spirit of said being does not pass with it's consciousness as it's somehow stopped from fusing into an afterlife existence.... Which may cause such disembodied beings as outsiders? things not tied to Mantle form can still try to effect reality, but it's less structured in it's attempted possession and it's inherent results... fyi reality champions choice, and Mantles don't take conscious choice away, they restructure it based on your own choices, while making the mantle replace your ID, But notice despite it all Molly is still able to choose as far as within the mantles authority? Looking for a new source of fighters was quite an elective choice... I theorize it has to do with the mantle changing as it subsumes your soul/identity into it.
Other stuff... what were we talking about again?

Terribly wrong, you are what you eat, doing a Hallow and remaining entirely yourself is nigh impossible i'd bet. Your eating a bunch of spirits.

I think the innocence being talked about were the people infected, but not turned who died.  Only the younger once's survived I believe.

Think then on the years they actually lived vs us normals, they owed Father Cronos a debt just as the denarians do, he collects. Dresden didn't 'take' anything from them except a curse they were fighting they're whole existence, acceptance of the curse and it's fringe benefits is one step closer to acceptance of the benefits of Rampirism. Notice the exact attitude of the one person whose had a problem with the fate of the fellowship? If any of them cared it would have been in the same vein of selfishness... considering they devoted their existence to fighting the Ramps I don't believe for one second any one of them was not ready and willing to die for their cause.