Maxwell’s working Sativus / he can hear magic

“Like build a working Sativus?”
“Yeah,” I said.
He looked at me for another moment and then his eyes went wide. “No ****?”
“No ****.”
“Can I see it?”
“No.”
“You just want me to take your word for it?”
I sighed and tugged out my travel wallet. “Don’t try anything,” I told him. “It’s bound to me. Fifty-foot tether. We’d both be dead before you got to the end of the block.”
He gestured at his bloated stomach. “Do I look like a big runner to you?”
“Appearances are deceiving.”
“Fair enough,” he said. “No tricks. Let’s see it.”
I pulled the medallion out by the chain, careful not to touch it. It’d been a week and the runes were still warm. The air cracked with fresh enchantments. At least, it did if you knew how to listen for them.

Excerpt From Ex-Communication, pg 229-230
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546