Ring

Leonel felt his strength sore. Beneath his closed eyelids, his eyes flickered with all sorts of colors and even his hair began to dance with a mysterious light. 

Leonel's skin shimmered like polished metal even beneath the dim lights of his private room. 

When his eyes opened, though, his gaze was surprisingly calm, albeit far deeper. Looking at the emptiness in front of him, Leonel sighed. Improving his Metal Body was definitely not cheap. 

And, even though now he could probably swipe at the air and make more Ores, that obviously took stamina. How foolish would it be for him to sap his energy just to gain more energy? Though, it might be useful in battle to heal himself. But, even then, it would be better if he just carried around a store of these Ores for those kind of situations.