Who said "I am grateful only to those who fuel my fire."?

This quote is attributed to Drogon.

I am grateful only to those who fuel my fire. - Drogon

"I am grateful only to those who fuel my fire."

Drogon Gratitude

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"