Match Mage by Zenina Masters

The wrong impulse leads him to imprisonment in the right place. Meet the newest Match Mage of the Enchanted Crossroads.
Tomas has lived a carefree life, his family is gone, and he has no one to cater to but himself, so he spends his nights drinking and paying for it with magic.

It was supposed to be a small spell to let young lovers have a night together without the interference of the lady’s fey godmother. It was little enough to do; he simply waited until the appointed time and opened a rift in the wall of magic around the woman in question.

He really should have asked her first.
His innocent client tried to kill her, and Tomas ended up sentenced to having his magic bound to him for fifty years. Only one spell would come when he called, and it was the balancing spell. He was now a servant of the Crossroads, glyphed and bound.

Trill is assigned to keep an eye on his adjustment to the Crossroads, and a more reluctant parole officer has never been seen.