Who said "My education was written in blood and ash."?

This quote is attributed to Drogon.

My education was written in blood and ash. - Drogon

"My education was written in blood and ash."

Drogon Education

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."