The Alchemists of Loom (Loom Saga, #1)

by Elise Kova

Tracking the muzzle of the gun over the Rider that was still engaged with Cvareh, Florence planted her feet and pulled the trigger. It was a smaller version of the canister she’d given Arianna on her mission at the refinery—small enough that it required no extra magic besides what Arianna had stored in the gun with a flare of Alchemical runes. A beam of pure magic shot straight and true, punching a hole through the shoulder of the Rider that loomed over a bloody Cvareh. She stumbled, dazed. Arianna knew that look: glazed, dull eyes sent reeling from a sudden surge of foreign magic. She’d inflicted it on enough people to know it well and had seen it in Cvareh’s eyes when he’d imbibed from her.

Good worldbuilding of le magic