Bloodline by Jessica Ann Disciacca

“Some fates are worse than death. Some sacrifices demand everything.”

To save her mate, Seren dares to breach the fiery realms of Hell, opening a gateway that will alter her destiny forever. Enduring relentless torment—both physical and mental—she clings to the hope that Deus’s soul is not beyond redemption.
But when a mysterious figure enters the game, Seren takes a desperate gamble, believing they hold the key to saving not just Deus, but the entire world. Yet, uncovering their true identity forces her to confront a fate she never saw coming—one that will change everything.
Lucifer, consumed by his obsession with power, vows to annihilate Seren and everything she loves. As the final battle looms, unlikely allies—witches, gods, and demons—stand together against the rising darkness.

The fate of the world hangs in the balance. And in the end, Seren realizes the ultimate truth: her death is the price of salvation.