The Mysterious Stone Stele!
The elder mage narrowed his eyes at Roy and asked in a bewildered voice, "Boy, how did you… get so slim?"
Smiling back at Vizards with his whole face, Roy replied, "As you already know, I was the host of a deadly parasite. It kills a person by inducing mana intolerance in them whilst creating shells containing Mana in their body called Mana Fat. These shells don't have a long lifetime, but until they live, the mana is contained inside them, never leaking out, which in turn, protects the host from harm. I was meant to die the day they decayed. But I've already gotten rid of it. So I'll be fine.
"Anyways, it was the cause of my obesity. It had created Mana Fat in me. There's this technique I got from the Wind Fairy King's trial grounds that allows me to convert Mana into Mana Fat and vice versa. Its name is Tyrant's Body Meditation Technique. With its help, I burned down all my Mana Fat. That's how I slimmed down so much and now look like this."