Justice League Dark (2018-2020) #20

The Floronic Man’s unintended rise to power has thrown The Parliaments of Life into chaos. Even though the villain lies deep in the cells of the Hall of Justice, life itself is being warped by his reach! With Swamp Thing gone, the Justice League Dark must join forces with some of the most powerful avatars, like Animal Man, to help set things right. But the magical team’s troubles are just beginning, as an old evil from a familiar swamp casts its shadow over them all, waiting for the perfect time to strike!