Are you suggesting Bianca's employee was the real target there? I thought she was collateral damage of attacking Marcone's lieutenant - Sells' whole turf war was with Marcone.
The 'two-fer' being deliberate would have required careful timing to strike just as they were intimate enough to get both with one use of the curse. I kind of doubt Sells would have been up to prepping the curse ritual and spying through shadows on them to time it that closely...
In terms of the plot, the killing was a message. I can reach you anywhere, at any moment. And you use the tools that you are good with. In this case magic and ritual. So a message directed at Marcone. And he would have known what it was. Much as everyone knows what bodies hanging off overpasses in Mexico is communicating.
I'm not buying the "collateral damage" theory. This isn't a random spell that would've hit everyone in the room, or everyone in the bed... etc... Every victim is a target; it rips out specific hearts, not "any heart in the right spot."
We know the Ramps have the big-ritual heart-ripper (they used it in Changes) and we know from Vadderung that it's basically the same spell -- of the same origin -- as what Sells used. That says to me that the origin (of both) is the Black Council.
But there's more than one thing going on, and they may not -- in fact, probably were not -- all coming from the same people pulling strings.
There's the overt criminal turf-war, Sells-v-Marcone. I think Sells is his own agency here -- Big Man doing some dick-waving, gonna challenge Marcone.
Another turf-war, Raith-v-Bianca (because the Ramp was operating in the Whamp's "sex" domain). Raith figures the Sells/Marcone thing as his cover, letting him "pull the strings."
There's a magical turf-war, a new player in town staking a claim: the magical drug, but also the heart-ripper, the lightning-fuel, etc. On the one hand, that's Sells again, more dick-waving; but at a deeper level, that's whoever is
backing Sells, supplying him with his rituals & formulae &c.
Ultimately, as noted, the Heart-Ripper comes from the Black Council. They may well have nudged Raith into motion; I figure Papa Raith for a BC asset, maybe even a member of the BC's Senior Council / Inner Circle / whatever...
probably not quite that high, and likely an "external" asset, not actually a part of the Circle.
Then there's the secondary/reactive effects -- the "turf wars" were ACTIONS, and we all know those lead to REACTIONS...
For our purposes, getting Harry involved was a key reaction. Who wanted Harry in this thing? Whoever was feeding the high-level magic to Sells was probably doing so (at least in part) to get Harry involved (unless that
specific person was a cut-out, being manipulated by someone
ELSE who wanted Harry involved (and how many layers deep into THAT recursion do we care to delve?)).
But Harry's involvement was pretty inevitable in a magical kerfuffle of this scope. There's no way he could have
not noticed (and being who he is, no way he wouldn't get involved). This in turn implies either someone who knows Harry very well indeed, or someone with extensive intelligence-resources and a good profile of Harry; more on that below.
Marcone and Bianca were likely to react, given that both their people were murdered & both of them take that sort of thing as threats. Marcone finally elected his "reaction" simply be letting Harry be his stalking-horse to handle the Shadowman situation, while Marcone himself waited to take advantage of whatever the outcome. Bianca, as we know, ALSO let Harry be her proxy against Sells (but also began laying plans against Harry himself).
Sells seems likely to have been sending the threat to Marcone... but not so much threatening Bianca (which as noted seems to imply Raith).
And I'm going back to Harry's original theorizing, that the killer(s) were involved with the victims, which implies that Sells knew both of them. Maybe it was as simple as Sells being one of Jennifer Stanton's "Johns," and he got obsessive / jealous. Alternatively, maybe Sells had a partner -- Sells got Tommy via hating Marcone, and the partner got Jennifer via hating Bianca. You recall what Harry said: this magic needed the caster to hate really intensely, to believe whole-heartedly in the outcome.
But the
real hate we know of in this situation? It's Helen Beckitt's hatred of Marcone. She was only Sells' "flunky" on the magical side of things, but she hated Marcone with the kind of passion that could easily encompass murder.
So I'm guessing that minor-talent Hatin' Helen got pointed at strong-but-untrained Victor by somebody. That may or may not be the person who was giving Sells the sophisticated rituals & formulae.
I bet Mab is involved, somehow, making a move to groom her Winter Knight. I'm nominating her to have pointed the Beckitts at Sells, so Helen's hate could fuel & focus the heart-ripper. That "feels like" a Mab-move, the kind of secret she'd know (about Marcone shooting her daughter, and her resulting hatred), the kind of manipulation that puts Helen & and BlackCouncil-catspaw Victor into one anothers' orbits.
This STILL leaves a question of who hated Bianca (or Jennifer) enough; I don't have a good theory here, alas.
# # #
New let's get back to "getting Harry involved." As I said above, someone had to know Harry himself, his reactions. Either personal knowledge, or a good profile.
Of personal knowledge, we have Eb and Elaine (and maybe Justin, if one of the "Justin Survived, or came back" theories is true). I don't think Eb got Harry involved -- the mess was TOO messy, to many likely ways for Harry to get killed, and I'm pretty sure Eb wants Harry to live. Elaine... maybe. I think she's too junior an operator, at this point; but her information could have been used by Aurora, or by Nemesis. If Nemesis knew of a Starborn wizard, I could see "likely to get killed" as a good motivation. But I... kind of think that's it, on "personal knowledge." At the beginning of Storm Front, it looks like Harry was a bit of an antisocial magic-nerd: going to work, then "socializing" with Bob in his la-BOR-a-tor-y, and no other life.
But... having a profile on "
Dresden, Harry (Wizard(WC). Starborn(?)" ...?
Egads... who DOESN'T have a file???
We know the Whamp's keep such files; Lara gloated about the file on Ramirez, for example. I assume therefore that the Ramps kept such files, too (their extensive record-keeping was a repeated element in Changes, where they raided not one but TWO Ramp datacenters!!!). Vadderung had a file (of course). The White Council, and their Wardens, and presumably the Black Council. Mab (and likely Titania) -- not "files" as such, but extensive information they knew. Ivy -- Harry's own writing, plus anything any mortal wrote
about Harry.
As noted above, my bet is on Mab. Possibly detecting that the Black Council was moving to address "the Dresden Problem," and acting preemptively herself.