From Hell With Love (Beast in Black) = Emet-Selch, especially if you ship your WoL with him

Die by the Blade (Beast in Black) = Zenos

Sweating Bullets (Megadeth) = Fray

Deathbringer From the Sky (Ensiferum) = Nidhogg

Powersnake (Brothers of Metal) = Leviathan

Probably have more later, still waking up.