Of course, they were allowed to harm humans. The children of heaven being sent down were not common fodders to the old world; most of them were elite squads led by trusted subordinates. If they let the nasty humans freely chip on them, Nuwa could only expect an outburst from time to time.
Moreover, they were allowed to save humans from other humans. Hurting them was a necessity. However, crippling humans and killing them were already past the allowance given to the children of heaven. So yes, they could only draw less than a bucket of blood… albeit that it should be a small bucket.
'Though, it's not strange for them to think of it like this. Humans of the new world found themselves at the top of the food chain. Moreover, they didn't think demons and immortals still exist in their lands.' Xu Rouguang sneered inwardly. 'Those who had done the prior movies worked with too little materials.'