The Kingmaker's Sword — P.A. Mason

Gretchen always knew her trusty infinity pouch held a world full of secrets, but she didn't imagine she was carrying around a relic that could bring down a kingdom. Or that it would land her into a boiling pot where she ends up a fugitive from the witches and wizards alike. But standing accused of a shocking crime she didn't commit, this witch refuses to give in. An old friend in a dank sanctuary is all she has up her sleeve, and with a bit of ingenuity and kindness, she hatches a plan to be rid of the relic and clear her name. The kingdom depends on her, even if the monarchy doesn't know it. And what does she have to lose? Only her livelihood, freedom, and a friend from the other side of the aisle.