Vikram did not wait for the army to come by after he tied up all the men.
He just left them outside the settlement, and the imam hanging from the highest minaret of the mosque.
Ofcourse, he did not do it to humiliate or anything, he just told the Imam he is not allowed to stop talking, nor is he allowed to lie till the evening.
After dusk, if the people still want to listen to him, he is free.
How could he do such a thing? He must say it's owing to the Anbu. he had no idea how it does it, nor did he have any desire to know how this ether does it.
Nysha is their little baby, but Anbu obeys only as long as he wants to.
He had no idea how his mother obtained control of this frightening ether, but for him, it's an exchange of interests.
Anbu had something it wanted at these hunting grounds. Vikram wanted to vent his anger, and free the city from the crime, as befitting of his epithet ' Hero '.