Yes, that would be the fire demon Surtur and the secret murderous sister we never knew we had.

[He is the one who summoned the demon, but it's not like they had any better options at the time.]

My brother and I were able to escape with the survivors, but we were attacked on our way to Earth by a omnicidal maniac. I think most of the Asgardians were able to get to the escape vessels though.