A God's Bones

Grey was standing in the same position, trying to get control of himself once again, but he was hearing a voice in his head which was repeatedly saying he should absorb the bones and become stronger. 

According to the voice, these were bones of a God Plane Elementalist and his strength would skyrocket the second he absorbed it. It even used the case of the man Grey fought as an example, telling him that the man increased his strength due to just opening the coffin and absorbing the stored essence there. With the complete bones, the God Plane was not far from him. 

In the darkness, Grey couldn't see anything, but he could hear a voice. 

"Absorb it. Take it all in. You'll become stronger." 

"I've grown this strong without having to absorb any bones, why would I do that now?" Grey asked mockingly.