Yo how bout a tour to Valyria? MC can get some treasures from extinct Dragonlord families. I mean if Euron Greyjoy can make a trip there and survive, I'm sure MC can do the same.
Such a dumb move why would you grant them liberty to develop something that keeps your family in power. Thank you for the chapter but I do not believe anything would justify developing a poison that would kill off your families dragon