Immortal hosts

"Fallen, I know," I said. "Order of the Blackened Denarius. But they have to play by the rules, right?"
"Harry, it isn't just the Fallen. The people they've taken are nearly as bad. They're assassins, poisoners, warriors, sorcerers-"
"Sorcerers?"
"The coins make them effectively immortal. Some of the Order have had a thousand years to practice, and maybe more. That much time, even modest talents can grow teeth. Never mind everything experience would have taught them, everything they could have found to make themselves stronger over the years. Even without infernal superpowers, they'd be badass."
I frowned, and tore the bits of paper into smaller bits. "Badass enough to manage that curse?"
"There's no question that they'd have the skill. Maybe enough that they wouldn't need as big a power source."


Death Masks Chapter 8, Page 82