Koloss are creatures from the Mistborn series of books. These are giant modified humanoids who have grown to such massive proportions their skin is tearing in places as they become larger, the skin is blue in color, implying the humans used to create them may now be undead. There are armies of them serving the Lord Ruler, posing an existential threat to the main characters in the story.
Both of these pencil sketches were made in 2012 while I was reading Brandon Sanderson's Mistborn trilogy. Both drawings were modified in Photoshop, but you can still see their pencil origins. I have wanted to do a bigger painting featuring the Koloss in more detail, hopefully some day soon!
Other Mistborn Artowrks:
