In the end, Black Bull spent his time cultivating spiritual herbs and studying formations, layering one small formation upon another.

The small illusion formation and the small wind-fire formation had been perfectly layered; once activated, anyone who touched it would suffer greatly!

Without a master to guide him, Black Bull had embarked on a unique path of formations, one that even Chen Xun couldn't discern as orthodox or unorthodox.

Due to his limited knowledge of formations, he often stacked formation flags, exchanging many flags and formation materials within the sect.