How did God evolve the world Ma Chao?

When Ma Chao is at 50J, the word evolution will automatically appear in the skill panel. After entering the board, you will be prompted to evolve into shura or god of war. After choosing one of them, you can challenge the copy to get evolutionary materials, which can be used to evolve skills. Otherwise, even if your Ma Chao evolves into a shura or a god of war, your skills will remain unchanged.

In addition, it can't be changed after evolution, that is to say, a Ma Chao can't become a god of war after he evolves into a shura, and vice versa.