This piece is the epic battle between Fingolfin, High king of the Noldorin Elves, and the Great Enemy Morgoth, to whom even Sauron was but a lieutenant. Morgoth stole the precious Silmaril jewels from the house of Fëanor and set them in his iron crown. Many years later, Fingolfin set out to the gates of Utumno and challenged the dark lord to single combat. Morgoth attemped to crush his foe with Grond, hammer of the underworld, but ended up cracking holes in the earth, from which fire and lava erupted.
There's only a few renditions that I feel do this duel justice. One of them is naturally the John Howe interpretation but yours is added into my list. I find there's a creepiness (in the most horrific of ways) about the way you captured Morgoth and yours is the only version I've seen that shows Grond spraying up lava.
This is a really great depiction of this scene. Most people (just my humble opinion) make Morgoth far too large. They're still good pics but how on earth would his foot fit on Fingolfin's throat if it was bigger than his whole body??? Oh well. I also like Fingolfin's armor.