I Opened up Countless Secret Realms

Black peaks tower into the clouds, white thunder surges in the clouds, the vast land stretches as far as the eye can see, and figures as tiny as ants but with firm steps are walking forward... They firmly believe that the secret treasure is ahead. Qin Cang looked down at the secret realm he had just opened, and felt that something was missing. So, he waved his hand, and the sky exploded, and the thunderclouds dispersed, revealing... High-level math questions covering the sky. The figures on the ground turned to stone instantly. "Passengers A, B and C can't pass the second level of the secret realm. You finally get twelve drops of the divine thunder treasure liquid." Qin Cang nodded with satisfaction, waved his sleeves, and took away a high-level math question. This is the story of a boy who continues to grow stronger by opening up a secret realm to obtain various resources.