A Certain Multiverse's Unspeakable Horror

He transmigrated to Yharnam, the setting of a cosmic-horror game, and had hoped to live a peaceful life. But things didn't go as planned. A sudden, inexplicable transformation set him on the path to supreme evolution... He is an Outer God who transcends the world, a supreme being above the void, a ruler who commands calamity! All living things in the universe, look up! Worship! Praise! Even if you would crumble in a single instant, that instant alone would make your life worthwhile! When the stars align and the clock strikes, the Old Ruler will awaken. He will seize their powers, devour their bodies, consume their souls, and then take his seat upon the highest throne! 【The early part of this book is a crossover featuring the worlds of Parasyte, Ajin, Highschool of the Dead, and more...】