The Nome King is the newest villain in the Dorothy Must Die series. He appears in third book of the DMD series: Yellow brick war. He believes Amy Gumm will be of better use to conquer Oz than Dorothy. Making Amy find Dorothy's silver shoes on purpose.
The Nome King is a character created by American author L. Frank Baum. He was introduced in Baum's third book Ozma Of Oz (1907). The Nome King is the most frequent antagonist throughout the entire series.