I have an eye of truth

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