He should do something unique to his status as a supreme adventure ending dungeon boss.
"Pigman!" Elements exclaimed. He glided next to what was apparently a fertile goddess holding his companion pig. "Yes?" Pigman asked, holding Juryo a little closer.
"Pigman, you are my favorite. I really like you. So I have a proposition to offer you. I'm a dungeon boss, I'm so strong I have MILLIONs of HP and strong attacks.
I can get you strong too. You may not have wings, or fangs, or a poison stinger, but you have something. You have a pig to ride. So I know if you and him both buff up, you can become just as strong as Zhu Bhaije, my other dungeon boss friend! He and his piggie are so strong that any adventurers he fights he charges them and knocks them down to ONE HP, even if they had thousands! Now, for some reason, he always follows that up by eating a snack, that is not exactly the wisest follow up. But, you're already smarter than that, so if you train with me you can be smart
Pigman seems reluctant. He was very interested up until the part where he needed to spend precious magic stones. "Hm, I can think about it."
"Look at how much your pig wants it! He wants to become
Elements' comment did not seem particularly burdened by reality. Juryo had wriggled out of Pigman's grip during the conversation, and was currently wallowing in mud. He let out a piggish squeal meant to indicate how delightful the mud felt to him.
"As a manticore, I can translate that for you, and I promise to do so honestly..."