You Owe Me a Promise

In the ancient and mysterious world, Warcraft occupies seven parts of the world, and the remaining three parts belong to humans; Warcraft are bloodthirsty and greedy, trying to drive out all humans, trying to control the world and become the master of the world. I heard that in that battle, both humans and gods were destroyed, trees did not grow for a hundred years, the sky collapsed, and the ground cracked... Everything starts with this book.