Who said "The greatest battle is often won without a single flame."?

This quote is attributed to Drogon.

The greatest battle is often won without a single flame. - Drogon

"The greatest battle is often won without a single flame."

Drogon War

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."