The Nome King

ノーム王

The Nome King rules the Nome kingdom, situated in the Deadly Desert. He has previously attempted to conquer all of Oz to seize control of the Emerald City, but these efforts have failed so far because the desert's warm climate and intense sunlight exhausted the Nomes.
The Nome King is very short and attempts to compensate by demonstrating his power as a ruler to everyone. He drained the entire sea, leaving only a vast desert (since it made him feel small), and he kidnapped the Prince of Ev.
After Dorothy and her friends rescue the prince from the Nome King in Ozma of Oz, the King becomes enraged and schemes for revenge by conquering Oz and ruling the Emerald City. He pursues this goal with the assistance of General Guph and a Giant Worm (in The Emerald City of Oz). The Nomes employ the worm to dig a tunnel beneath the Deadly Desert toward the Emerald City.