More Uses of Death Energy [Bonus]

Five days ago, when he started tempering his mana core, he made a wonderful discovery. 

While he could temper his core using the old supreme mage's method, which was a slow and painful process, or he could use his bloodline energy or the Nascent Energy to do it faster and without any pain.

When he, however, experimented with the Death Energy, which at that time he felt stupid for trying, he was pleasantly surprised to discover that it could temper his mana core several times faster than the Nascent Energy could.

Not to mention, it was a more thorough tempering and could refine his mana at the same time, condensing it and making it more powerful.

He was about to focus on tempering his mana and mana core when a thought crossed his mind.

'If the Death Energy can temper them, couldn't it temper my body too?'