Darkseid

Darkseid is an all powerful being who has been granted with the power of the Omega Beams. He is also the leader of the New Gods and ruler of the planet Apokolips. He has an army of demon like creatures named Parademons and he uses them and his team The New God's to conquer different planets.

After all the universal threats Earth has fought off Darkseid decided to take notice. He challenged the Justice League and any hero to a battle for their planet. He lost and he has swarn vengeance on their planet and he shall one day rule over it.