And thats just awsome!

I remember this from ages ago.
I think "Demon" is a death metal song IMO.
If Six Feet Under can be a death metal band.. Demon is a death metal song
You just gotta think what death metal is. not what defines it
Sure Trivium are not a death metal band. But Ember to Inferno as an album is more closer to early melodic death metal then anything else they have released. (I would say Ember to Inferno is a melodic death metal album. This is my own opinion and if anyone disagrees, fine with me)
Matt's vocals in the song remind me of old skool death metal vocals. The way he says "Dieeee" I cant help think of Scream Bloody Gore.
He even does a sort of "growl".
N.B In my defence at a comment on the page before about "3 people who voted yes not knowing anything about death metal", when I made this thread that was true. But since then my knowledge of death metal is quite high now even if I make a few mistakes now and then. But to me Demon is a death metal song. Well, an death/thrash kind of song. It's not full on death metal. But it reminds me of Slayer (thrash) and Death (thrash metal yet death metal).

Your right it is alot heavier then most of Trivium stuff, the Demon sounds more like death/black metal then any of Trivium useal stuff.

I would say its like black metal