The Silver Warriors (Erekosë, #2)

The second novel in the History of John Daker, The Eternal Champion. Phoenix in Obsidian aka The Silver Warriors.

Erekose made his choice, and fought against humanity. With them destroyed, he has no choice but to find solace with the Eldren.
There is no rest for the Eternal Champion though, and again he changes, Urlik Skarsol is now Erekose and Erekose is Urlik, prince of the Southern Ice. He just wants to get back to his lover, but fate has other plans. He also now has the Black Sword, the stealer of souls, and it has much work to do before Erekose can rest.