Sword Spirit

This book looked quite ordinary and had a gray cover. The title was Yin Soul Book, and it was made out of ordinary paper and was not very special. However, it contained a very powerful Yin energy that made people feel that it was not simple and that it was an evil item.

Zhao Fu felt quite expectant because the first level had given him a scroll that could summon one billion ghosts, so the reward from the second level definitely wouldn't be lacking. After looking at the book's information, Zhao Fu was greatly delighted.

This was because the book recorded a method for developing Yin Soul Beasts, as well as a method for fusing Yin Soul Beasts and controlling Yin Soul Beasts

Yin Soul Beasts had around Stage 1 strength, but if they were fused into Stage 1 soldiers' bodies, the Stage 1 soldiers would have Stage 2 power and would have Yin Soul Beast abilities.