let's see this to the end... together.
Summary:
Eventually, the malevolent voices welcomed themselves into her mind. It was anything but forceful. And as she left her sanctuary, Keres took them with her. To the outside world. Where she can finally execute her plan. A new God was born from the depths of the void. With her is a thirst for vengeance and a million baleful spirits hiding in the shadows of her mind. She did not know if this was what Xenon planned for her, but even if it isn't, he'd be too late to stop her now. She felt reborn, a different streak of power surging in her veins... something forbidding, something more sinister.
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Or, that regression-villainess trope where the FL dies heroically for the family and returns a villainess...thinking it's still for the family.
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"she dies a mortal and returns anything but; and she's ready for revenge."
https://www.wattpad.com/story/279468428