Well now he has Magic and a Dragon Core to go along with 70 years of martial experience, his homicidal ring elemental, and his sarcastic mech partner. Seems they are trying to make someone who can actually challenge dragons.
If the first evolution turned a 40 year old in to a 20 year old, the second evolution will turn the 20 year old into... a 10 year old? Back to loli form!
It's impossible now. The dragon trapped himself. He wanted to feel like a parent to get self-satisfaction. And now, he is suffering from his love to his foster child.