The Last Summoner of Eden

Kaelen, a timid librarian haunted by the loss of his family to the encroaching demonic blight, discovers he's the last scion of the forgotten Summoner bloodline. A system notification proclaims his unique ability: 'Summon: Eden's Echoes' - the power to call forth spectral, god-like beings from a mythological paradise. Yet, each summon drains his life force, pushing him closer to the abyss. As the demonic legions coalesce, threatening to shatter the last human bastions, Kaelen must master his terrifying power. Can a man burdened by grief and a deep-seated fear of failure become the shield humanity desperately needs, or will Eden's whispers be his final, fatal lullaby? The fate of a dying world rests on his trembling hands.