Didn't Grey link himself to a origin source already present in the Chaos Space ? It was even said to give a more archaic property to his elements.
ch 1276 No Way To Check Elemental Grades
Fantasy · Springs_Halo
He only had 15,700 points before, then spent 15,000 of them to buy his concealment and professional killer ability, so where did the extra 2,000 points come from that allowed him to buy the sense ability?
Nux quickly bought the skill and just like before, he knew how to activate it as if it was the most natural thing to do.
Fantasy · SleepDeprivedSloth
I heard that the author was Korean and was doing his military service. And I don't know if you're familiar with the relationship between Koreans and their military service, but that explains the current state of chapter releases.
Monarch of Time
Eastern · ZeusTheOlympian