Ragnarok would have rolled his eyes if it were possible. They can't give the shard of power away, even if they want to. Legion would need to die for that to be remotely possible, and they are not willing to do that. So all of this talk is not going to change anything.
The dragon king doesn't expect to convince them to give up their lives. That's why he is going to perform the naming ceremony on Ragnarok.
"You may not be a dragon, but I will accept you nonetheless. It will be your grace to become a dragon."
The mountain of wealth in the middle of the plane broke apart. It was leveled to reveal a drop of blood. This drop of blood is the foundation of the dragon spirit. It is a very important item for harnessing the power of all the dragons born in the realm of high heaven, but the dragon king is willing to sacrifice all of that to turn Ragnarok into a dragon.
"You like to devour things, don't you? Let me see how well you like this."
