Three months after Sera broke the Oath Crown, wild magic is blooming across Lumeris — every careless promise coming true. And it's all leaking from one man: Dorian Vale. The shattered crown poured its power into him, and now someone is gathering its scattered shards to reforge it. They need a living vessel. They need Dorian. Lady Morvain has three shards, an oath-smith, and a plan to set a new crown on Dorian's head and rule through him. To stop her, Sera must attempt the one theft she swore she'd never try — stealing raw power itself. It will cost her everything she is. The Oath Breaker is the sequel to The Oath Thief: a romantasy of broken vows, binding magic, and the choice to love freely — no oath required.