Thinking on it now, the reason he let them leave just now was not because of fear towards Sun Moon Divine Hall… but it was clearly because he despised to even lay his hands on them!
“Hmph!” the black-robed old man scoffed lightly, the icy-blue flames in his palm swayed. “I let you leave just now, but you deliberately provoked me and made me break my ten thousand year vow to not kill. Now you want to leave? How can I let you off so easily!”
The black-robed old man’s voice was not calm like water like before anymore, but there was some anger in it now, and obviously, it was anger of breaking his vow! The “ten thousand year vow” that came from his mouth shocked everyone that was in his presence… This scary old man’s lifespan… was actually more than ten thousand years!!
To have a ten thousand year lifespan, how scary was this old man’s realm?!