This is the true God's Domain. Created by a mysterious four-dimensional civilization
The Green God Company run the known God's Domain in search of finding individuals able to enter the Greater God's Domain.
“The Green God Company didn’t develop God’s Domain. Instead, we only run it” - Xia Wuyuan
The minimum requirement is to be a half-step grandmaster standard , but a full mental strength grandmasteris required to support this one.
"This is because only mental strength grandmasters are capable of using the inherited device, and each grandmaster can bring along a maximum of only 60 people when entering that special world. Moreover, all the companions must be at the half-step grandmaster standard." - Xia Wuyuan