The son of Yuga Khan and Queen Heggra, Prince Uxas, second in line to the throne of Apokolips, plotted to seize power over the planet. When his brother attempted to claim the fabled Omega Force, Uxas murdered him and took the power for himself; transforming him into a rock-like creature, and taking a new name: Darkseid. With his newly found power and ability along with his charge as ruler of Apokolips, Darkseid has since sought to wipe all free will from the universe, believing there to be solace for all living things in ubiquitous servitude under his rule. Henceforth Darkseid imposes his unwavering opinion that he is entitled to not only his own throne, but all thrones. Darkseid is in your chair.
I want to know how he came to be sitting on Swamp Thing in that last one. What the hell?