Did two more sketches: some of the bad guys in The Hobbit. There are several, you know! Here are The Great Goblin (or, The Goblin King) and Azog the Defiler.
The Great Goblin, telling Thorin that "an old enemy" of his would pay well for his head.
Nothing else, just a head.
Azog is the "old enemy" of Thorin's, who Thorin assumed had died from the battle wound he gave Azog in the battle for Moria.
Here, Azog is realizing that he will finally get a chance to wreak revenge upon the dwarf who cut off his arm!