Angel Fury by Ella Summers

Cadence Lightbringer, daughter of a legendary archangel, has always known her gods-endowed magic comes with a price. As an angel in the Legion of Angels, she lives where the Legion commands her to live, trains how the Legion tells her to train, and marries whom the Legion instructs her to marry.

Somehow it all sounded simpler in her head.

When Cadence is ordered to marry the enigmatic angel Damiel Dragonsire, a man she hardly knows, her whole perfect, predictable life is turned upside down. The wedding, however, is cut short by a dark threat that throws Cadence and Damiel into a world of magic as ancient and deadly as the original Immortals, powerful deities who once ruled the entire known universe.

Angel Fury is the second book in the Immortal Legacy series.