Harley Quinn #21
In "Task Force XX Chapter Four," the Element-X monster returns to Earth with a vengeful purpose, targeting Luke for imprisoning it on the Moon. Harley Quinn, Ben, Sam, and Caitlin race to reunite with Luke, using whatever means they can to stop the creature before it's too late. Written by Stephanie Phillips and illustrated by Simone Buonfantino, with colors by Romulo Fajardo Jr. and letters by AndWorld Design, the issue's cover by JonBoy Meyers captures the escalating tension.
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The Element-X monster has transported back to Earth and plans to take revenge on Luke for trapping it on the Moon. Harley, Ben, Sam, and Caitlin find a way to transport back to Earth to help Luke against the creature.
Plot details indexed by the Grand Comics Database (CC BY-SA).