In the world of nature, it's already not bad to avoid harming others, and if one is harmed, of course they will fight back!
Didn't Jiang Tang also kill quite a few people?
Because he was upholding justice, no matter how many people he killed, it wouldn't tarnish his name!
But that remnant soul was different, perhaps it had ill intentions and harmed good people too!
During the resource scramble, it killed many people, the family didn't know!
The outsiders didn't know!
The Worm Poison was too potent, too domineering, many cultivators feared such pets.
Jiang Tang had special abilities; at the time, he had the Hell Palace. When he first met Dugu Yan'er, he sent the gift of Worm Poison into the Hell Palace, exterminating the insects!
Only then did he subdue Dugu Yan'er!
The punishment Jiang Tang gave to the ghostly shadow was to ensure it could never use Worm Poison again, and because it was a remnant soul of an Immortal, it could never cultivate a physical body again!
