Feng Wuchen possessed the memories of the Evil Dragon God, and with those memories came any cultivation technique he could desire. As long as he wished, all the members of the Feng family could practice Earth Rank or even Heaven Rank martial techniques.
However, the Feng family's strength was too weak, and if they were to suddenly practice powerful martial techniques, it would certainly arouse suspicion and could bring great trouble to the family.
Therefore, they would wait until the Feng family's strength had grown stronger before Feng Wuchen would reveal the powerful cultivation techniques.
Such matters could not be rushed; what was most important was to enhance their strength, not to practice powerful martial techniques.
