Bloodline curse is supercharged Victor Sells spell

"The Red King and his inner circle, the Lords of Outer Night, have got some big juju to brew up. They need a site of power to do it. For this, they'll use Chichén Itzá."
"Why there?"
"They're enacting a sacrifice. Like in the old days." A snarl of anger touched his voice, and made it suddenly frightening. "They're preparing a bloodline curse."
"A what?"
"Death magic," he said, "focused upon the bloodline. From the sacrifice, the child, to her brothers, sisters, and parents. From the parents to their brothers, sisters, and parents, and so on. Spreading up the family tree until there's no one left."
A chill hit my guts. "I've . . . never even heard of death magic on that kind of scale. The energy required for that . . . It's enormous." I stopped for a moment and then said, "And it's stupid. Susan was an only child, and she's already lost her parents. Same with me . . ."
Vadderung arched an eyebrow at me. "Is it? They like to be thorough, those old monsters."
I smoothed my expression over, trying not to give away anything. This spell they were doing would kill me, if they pulled it off. It could also kill my only family, my half brother, Thomas. "How does it work?" I asked him, my voice subdued.
"It tears out the heart," Vadderung said. "Rips it to bits on the way out, too. Sound familiar?"
"Hell's bells," I said quietly. It had been years since I had even thought about Victor Sells or his victims. They had featured in my nightmares for quite a while until I upgraded.
Vadderung leaned toward me, his blue eye very bright. "It's all connected, Dresden. The whole game. And you're only now beginning to learn who the players are." He settled back into his seat, letting silence add emphasis to his statement before he continued. "The sorcerer who used the spell in Chicago before didn't have strength enough to make it spread past the initial target. The Red Court does. No one has used Power on this scale in more than a millennium."


Changes Chapter 21, Page 202-203