How did the cold light come about?

"Master, aren't we going?"Juliet handed the grilled fish in her hand to Blighter Steven.
"I want to see who the thugs are chasing this time!"Blighter Steven took the grilled fish and gave half to Juliet, who took a light bite.
"Mm, it tastes good, you two should try it too!"
Qinglong and Qilin looked at each other, took the other half of the grilled fish handed over by Juliet, each divided it in half and started eating.
"How can we find this person in such a big Mount Os?"Juliet asked...