Imperator Mar'gok is a supporting antagonist in World of Warcraft: Warlords of Draenor. He was the Sorcerer King of the Gorian Empire on Draenor and the ruler of the ogres. In the original timeline, he was burned alive by Cho'gall, but in the altered timeline, he allied himself with Grommash Hellscream and his Iron Horde, though he ultimately planned to betray him.
The adventure guide says this about Mar'gok:
As the grand Imperator of Highmaul, Mar'gok is descended from a long line of sorcerers who have ruled the Gorian Empire. Equal parts cunning and brutality, Mar'gok recognized the rising tide of the Iron Horde and what it would mean to oppose them. He has acquiesced to an alliance with Grommash, even as he continues to search for a way to tip the balance of power back into his favor.