Who said "Your children will know only ash and smoke."?

This quote is attributed to Surtur.

Your children will know only ash and smoke. - Surtur

"Your children will know only ash and smoke."

Surtur War

"I am the doom of your civilization."

"Your world will burn, and from the ashes, something new shall rise."

"Ragnarok is not an ending—it is a beginning."

"All things must fall so that all things may be reborn."

"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."