Shamans

Also unknown to Jon, his leaking bloodlust picked up the process the shamans weren't able to continue, and his bloodlust sped up the process so much that visible changes started taking place.

The black lightning that only flickering once in a while was now flashing around like Laura's lightning. And the worse part was that Jon couldn't control his bloodlust to say he should stop or anything like that, and the Jon himself wasn't even trying to stop it.

He knew the person or people responsible would come with this, and he wasn't going to just let them live or die peacefully.

As for Amelia, she couldn't do anything.

First, this was going against the rule she was to follow, if she influenced Jon's decision in anyway, she would be punished. The second was, Jon himself wanted this, she was looking at his face and he still looked sane enough.