The Unseen World - The Demon of Despair. The Unseen World, #6

After tearing apart four realms of the Inferno, Daria thought she is closed to destroy hell itself. She was wrong. The boundary between worlds has fractured, and what once lived below now seeps into reality, through people, through memory, through the quiet spaces where pain was never healed. Cities bend, time collapses, and something unseen begins to take shape inside the living. Daria is no longer just a weapon.
She is the breach. Haunted by what she has unleashed and hunted by forces older than gods, she must confront the truth no one can survive unchanged: hell was never a place, it was always waiting to be born within us. And now, it has. To stop what's coming, Daria must choose, become the end of everything. or rewrite the world before it forgets what it means to exist.