Wizard: I'm leveling up by AFK in another world

Wizards use the spirit realm as their vessel to conquer the heavens. With the crystallization of civilizations across countless worlds, they forge an endless path to becoming wizards! In this world obsessed with resources and knowledge, Claire did not follow any conqueror's legions, becoming a "pacifist" remaining in the main world. To outsiders, this young wizard seemed to be wasting his talent and precious time in the main world's library. In reality, his avatars were already absorbing energy in the deep sea, deducing forbidden arts in the lava hell, and establishing a divine kingdom atop the wasteland. When he returned from his cross-realm journey, the book he always held gently closed. In an instant, the world's foundation of billions of years, the vanished ancient bloodlines, and the world-destroying forbidden magic all converged within him! "This book, 'Endless World,' doesn't seem as difficult to read as you all said?"