The 3 demons Abnegazar, Rath and Ghast came to earth and used their magic to defeat and enslave the people of earth, until the timeless ones (a race in the universe) found a way to relinquish them to imprison them below the earth but, Felix Faust, a known villain in the Justice League universe found a way to free them and then, he joined them in an epic battle against the justice league, Hal Jordan included.
In the end, the league came out victorious but not without sweat.