Daenerys originally did not trust the maester, as he had a hand in teaching the evil witch Mirri Maz Duur. Marwyn had simply shrugged and replied that he had never denied knowledge to anyone who looked for it. Between Ser Barristan, Tyrion Lannister, and Marwyn the mage, she had a veritable wealth of knowledge, experience, and information on many topics and she intended to make full use of it in the coming weeks. She would be the greatest queen the world has ever known.