Magical runes. An immortal emperor. A young woman who faces the impossible. Nineteen-year-old Corina makes a mysterious discovery close to her home: in a dark cave lies an ancient rune abandoned for six hundred years. When she touches it, her quiet life changes forever. After capturing the rune's arcane power and cheating death, Corina learns she's a Possessor—the first in centuries. And she might be the only hope against an immortal and tyrannical emperor who reigns over her world. But lying in the shadows is something far more unsettling and powerful than a godlike emperor, and it's coming for her. It's coming for everything.

Corina has freed the Six Shards from the clutches of a tyrant, earning herself a small measure of peace. But being the first Possessor in centuries comes with responsibilities, and rest is not among them. Corina finds herself the middle of a war with the Defiancé. The rebels wield an unknown runic power that threatens to annihilate the already fragile Empire. In the midst of it all, a voice has been whispering in her mind. It calls itself God and has named Corina its hero. Forced to track down answers that could save the Empire and her sanity, Corina learns there are secrets in the world not even a Possessor should unearth. Oblivion is coming.

Corina has ended the reign of an immortal emperor, routed an army wielding powerful runic weapons, and restored freedom to the six shards. But her world now faces annihilation. Rivers have swelled and turned black, apocalyptic skies hang low, and evil has begun to take root in the heart of good men. The occult force known as Oblivion runs free, and he plots the destruction of all things. Worse, Corina discovers this is a war that has been waged for longer than humanity itself has existed. She’s playing a game meant for gods. It’s about time for everyone, including gods, to learn just how badly Corina Vyliss hates to lose.