The Silver Mage Series by P.L. Nunn

Dante Epherian was the greatest wizard the world had ever known, and the most dangerous, until he’d died defeating an evil that had threatened to extinguish humanity. And the world rested easier, two greats threats nullified in one fell blow. All but the girl who’d loved him despite of himself. But you can’t keep a good Wizard - - or a notoriously wicked one - - down. Only the world is a different one than the one he left, a world with a new religion and a new prophet who is more than he seems... moreDante Epherian was the greatest wizard the world had ever known, and the most dangerous, until he’d died defeating an evil that had threatened to extinguish humanity. And the world rested easier, two greats threats nullified in one fell blow. All but the girl who’d loved him despite of himself. But you can’t keep a good Wizard - - or a notoriously wicked one - - down. Only the world is a different one than the one he left, a world with a new religion and a new prophet who is more than he seems. The Silver Mage finds himself on the run, with his former brethren none the wiser and with ancient wards binding his awesome power, he has to rely on more mundane methods of finding freedom and dealing vengeance on the man that shackled him. less

With the allied forces of the south turned against them by the mysterious and powerful Prophet, the Dante Epherian and his arcane allies take refuge in the wintry kingdom of Sta-Veron, the seat of the Kastel's power. But having lost his chance at subsuming Dante's power, the Prophet turns his focus on destroying Dante's circle of friends and taking as his new host, the Winter King himself... moreWith the allied forces of the south turned against them by the mysterious and powerful Prophet, the Dante Epherian and his arcane allies take refuge in the wintry kingdom of Sta-Veron, the seat of the Kastel's power. But having lost his chance at subsuming Dante's power, the Prophet turns his focus on destroying Dante's circle of friends and taking as his new host, the Winter King himself. Unless Dante can prevent the Prophet from adding Kastel's considerable power to his own, the world is doomed. less

When foreign raiders take what Kastel, the Winter King loves, he and Dante chase them across the sea and find themselves in a distant, brutal land, at the mercy of forces that put them at a distinct disadvantage. Strangers in a strange land they discover a power that has lain dormant since before the Pharaohs ruled. Can Dante and Kastel overcome it, as well as the growing attraction between them?