Kidneys

The days slowly ticked by, but Leonel hardly noticed them. His body was as light as a feather, following along a natural progression that didn't even seem difficult to him. 

Then, one day…

BANG!

SHUUUUUUU!

A hot steam shot all around Leonel's body. 

Well, at first look it was just steam. But, upon second inspection, one would be shocked to find that it was actually Force. Tangible Force!

This wasn't the kind of Force only those with Internal Sight could see. Even mortals who hadn't come into contact with Force a day in their lives would very clearly be able to see it. This sort of shocking Crystallization was the likes of which even King Arthur hadn't reached!

Leonel took a deep breath. 

All the dense fog around him seemed to surge into his body, entering through his pores and boring into his soul, leaving him feeling incomparably refreshed. 

'I did it… This should also be the Strong Stage…'