Eclipse of the Crown by A.K. Caggiano — book slip

Damien and Amma find themselves at Yvlcon, a gathering of the most nefarious villains.

Damien's moral growth is tested as he navigates his past among his peers, while Amma faces her own temptations, particularly from a commanding blood mage.

Their budding romance is threatened when the Grand Order of Dread tasks Damien with confronting a destructive vortex. With an eclipse signaling doom, they must find a way to avert disaster or declare their feelings before the world ends.

Third in the Villains & Virtues series.