Capítulo 797: How The Realm Lord's Project Is Related To The Era Of Conquest.

The first sage was speaking, "The Will of the realm and the realm heart breaks when the realm tree is destroyed. So when a world god destroys a realm tree, they don't get the full realm heart but the fragmented parts. This is not a big problem. An origin god that wants to become a world god just needs the world engine and the world seed. They will use their Supreme law as the substitute for the world spark. They can become a world god with these three." 

"The problem is that a world made up of just those three is an imperfect world. It is a world capable of life but it has a big weakness. It can allow life to exist within it and life will rise up from it given enough time. But without the consciousness of all life, there is little control over the appearance of life. That is to say, the occurrence of life is random and out of the control of the world god."