Maxwell’s dagger, he can turn walls to vapor

Max bent over the road with a dagger he’d pulled from his coat and put the final touches on the circle he’d scratched into the pavement. He straightened up to stretch his back. “Anyway,” he said, picking up as if there’d been no interruption, “breaking Josh out was the easiest part. It’s not like he needed much convincing, either. A bit of alchemy turned the cell wall to water vapor for a minute, he walked out, and the bars and mesh reformed behind him. No sign of anything being tampered with. I’m sure it drove Stealth crazy.

Excerpt From Ex-Communication, pg 509
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546