RE: help look for title or author's website

#2
'originalforce' pid='828579' dateline='1508083304' Wrote: i only remember the main character undergoing some underground assassin test, which he completed and rewarded some mask that pretty much cleanse his player kill status.oh and some skill the main character used control/manipulation bone-muscle-hormone and room of silence/fear.

After reading the description of the novel you're trying to find, I thought of one possible novel that I have read which fits the description. 
https://royalroadl.com/fiction/11198/reborn-as-a-nine-tailed-fox-rewrite