The Final Calling (The Crucible Series Book 5)

Prophecies, tyrants, assassins, and exiled royalty aren't the things Edith Walsh thought she'd be dealing with when her training as a mage apprentice began. Her main focus is becoming an enchantress by completing the Final Calling—a grand scavenger hunt all apprentices undertake to gather items needed to craft their coveted staff and gain eternal life.
This challenge can prove lethal if care isn't taken to watch one's steps. But making matters worse, Edith has also been marked for death by the Steward of the Perosian Empire, a tyrant named Rothario, all because of a pesky prophecy made centuries before her birth foretelling his demise at her hands.
So what's a mage to do? Simple; accept the assistance of a sexy Perosian who's dealt with Rothario's minions for as long as he can remember. Yet Isaac wants far more than Edith's safety—she's his mate, and his fiery gaze, wicked tongue, and shameless seductions inflame her more intensely than she's ever known.
Convicted of murdering the imperial family of Perosia, Isaac's spent centuries as a fugitive hunted by a homeland he doesn't recall. But his ruthless talent for survival serves him well, and there's nothing he won't do to protect Edith from the forces threatening her life, even if it means sacrificing his own.