Demon King Santorakh is the King of the Shadow Realm, an unhospitable world with Demons as the citizens. Santorakh however, is also a God like creature, known as Kalkan. His power is the use of Energy, which can be used to destroy entire planets, even the universe.
The Torso. As you can see, Santorakh has the 2008 Makuta Torso. And no, he is NOT a Makuta.
The legs. Alone, they are as tall as a 2009 Glatorian. I used Gresh to compare.
The Spikes. Inspiration came from Tuma.
The Tail. Nice and long.
The Head. Yes, he has four eyes. Thought it would make him look scary.