The continental civilization is almost extinct, humans are relegated to the Holy City, and the Dharma Ending Age has arrived.

The little man Dino accidentally obtained the "Book of Taboo". In the cycle of death again and again, he delayed the collapse of the holy city and unveiled the veil of each era.

When later generations recalled his deeds, only some incomprehensible titles were left:

the Red Devil.

The Arbitrator of the Divine Court.

The one who looks back.

Prismatic Angel King.

Dragon of time and space.

The strongest undead...

The earth is invaded by an alien world. To protect their home, humans activate the core power of the earth and build a defense line, which is ninety-nine layers of the world. Weaken the external biological power layer by layer in the world to protect the homeland. The people on Earth hunt monsters, obtain their cores, and use them to increase their strength. The layered world connects to foreign lands and can occupy some weak worlds and make them part of itself. Wang Yang possesses the Eye of Truth, which allows him to quickly absorb monster cores, acquire monster skills and strengthen them, starting from the first level. There are five common professions in the main world: warrior, psychic, magician, diviner, and transformer

Li Yue traveled to the devil's castle, and he was not a cool vampire or a mysterious magician, but a bald brain spirit?

Fortunately, the brain spirit has the ability to perceive thoughts, move objects through the air, and shock souls... at least it can be considered a magical creature.

Li Yue, who has unlocked the "Demon's Encyclopedia", will start as a brain spirit, collect strange monsters, transform the inner demons, summon monsters from other worlds... wander in chaos and darkness, and climb to the top of the Demon King's City step by step.