I am trying to remember a novel where the MC got a part of a bone (the bone is from a beast) from an bad guy, where the bone has a skill etched on it. The bad guy surprised the MC with his strength and this was because of this skill from bones. If I remember correctly they fought in an arena environment type. This part was early in the novel, the MC was still trying to become strong. I also remembered that the MC needed certain amount of blood essence from certain beasts to cultivate that skill. That skill would give make his body stronger I think. Not too sure but I remember the beast was supposed to be gorilla/monkey type. Also further along the story the MC obtained a map showing him where there was a large amount of gorilla type beast in that continent/world.
It could also be Wu Dong Qian Kun, I remember him getting some kind of ape body strengthing techiniqie from an enemy and had to get stronger blood essence from like a dragon ape http://www.novelupdates.com/series/wu-dong-qian-kun/
Thanks! It was indeed WDQK. I googled "Wu Dong Qian Kun bone skill dragon ape" and saw the Devil Ape transformation. Man, I stopped reading this at chapter 320ish. Maybe I should start reading it again.