Yuga Khan is a villain who first appeared in New Gods Vol.3 17.
Yuga Khan was once the ruler of Apokolips, and he sired two sons with his wife, Queen Heggra. One was Drax, who was basically peace-loving, and the other was Uxas, also a gentle soul. But Khan knew that Uxas, when he finally claimed the Omega Force, would be a powerful force. Still, he didn't think his son would try to kill him and take the throne.
Yuga Khan was obsessed with becoming the most powerful being in the universe, and through this rule the universe as well. But even though he was the most powerful NewGod alive and apokolips was already the largest and most powerful empire in the Universe during his reign, Yuga Khan desired far more than just physical conquest, he also wished to learn everything that could be discovered about the universe as he believed knowledge was the ultimate power. So naturally, he also became obsessed with solving the mystery of the Source. He wished to know why he and the other New Gods existed. Izaya of New Genesis (who would later become Highfather) tried in vain to dissuade him from his quest. Yuga Khan eventually tried to force his way into the Source, and like all others before him, failed. He was imprisoned on the Source Wall and Queen Heggra assumed control of Apokolips. From his vantage point, Yuga Khan watched as Desaad killed Suli (as per Heggra's orders), and as Uxas became Darkseid. Then he saw Darkseid force Desaad into assassinating Heggra in retaliation for his wife's death. And then he looked on as Darkseid ascended to his throne to become the supreme ruler of Apokolips.
Eventually, through an exertion that could shake planets, he was able to tear himself free from the Source Wall. After absorbing the energy of several million planets and trillions of lives, Yuga Khan reach apokolips and took back his throne, he also killed Desaad for murdering his beloved wife.
Yuga Khan is one of the most powerful beings in the universe. He is the one being in all of existence whom even Darkseid fears; during the short time he assumed control of Apokalypse, Darkseid fled and hid from him. He is virtually invulnerable to harm, can fly through space and hyperspace at incredible speeds. He can wield and project extraordinary amounts of energy, enough to destroy planets. Yuga Khan can also drain the energy from living beings and planets into himself.