Poli's guess was right.
Tang Qi indeed did it on purpose. From the beginning, he decided to interrupt Poli's evolution and then deal with his memories. Unless something unexpected happens, Tang Qi would hand Poli over to the team dispatched by the FBI, but he must first eliminate all hidden dangers.
So when Tang Qi exterminated the hounds, he deliberately left a gap in the Body Control Spell.
With the power Poli has evolved so far, he couldn't break free.
The only way was for Poli to deliberately stimulate the Extraordinary Power he obtained from the Ancestor's Flower within him, to forcefully break the Body Control Spell, but this was tantamount to destroying his own path.
At that time, Poli could break free from control and also obtain power comparable to the "Blue Hound."
But the Black and White Level, perhaps, could no longer be hoped for.
