Compared to potion and pill alchemy, magic formations and aura arrays were much more difficult. An array master was much more difficult as a profession compared to being a potion or pill alchemist.
After all, an array master or magic formation master needed to have a deep understanding of heaven and earth as well as the placement of the aura veins located deep within the earth.
Because of the difficulty of being an array master, the cost of hiring an array master was very expensive. It was proof of the Luo Clan's wealth that they could hire an array master to create an aura array within the mansions of the Luo Clan's core yard.
And since it was the Luo Clan's core yard, only the strongest warriors as well as the most influential people of the Luo Clan could live in the core yard.
Deus had noticed that the old man of the Luo Clan that he had killed before was also living in the core yard since one of the mansions was currently empty.
