Speaking of which, Du You hadn't felt this kind of rapid advancement in decades. Even though Du You had a higher talent, after several decades, he was still far from leveling up.
But this time was different. After accepting the power integrated from this special doppelganger, Du You felt a very powerful sense of advancement. The benefits this doppelganger brought seemed even greater than he imagined.
Because it was entirely through comprehending the laws of different worlds for advancement, it had a strong promoting effect on Du You.
This manner of raising a doppelganger seemed to be a good method for law advancement.
Unfortunately, this method cannot be used too often, as each doppelganger requires the strength of one's soul as a seed. Creating doppelgangers too frequently or in excessive numbers is also a form of harm to oneself. If too many doppelgangers are lost, it could even have a permanent effect on oneself, making it impossible to continue advancing.
