Hal Jordan's time as the villain Parallax may have convinced a sizeable portion of fans that Green Lantern has a dark side, but his lesser-known possession shows that the hero is actually pretty harmless.
When Cyborg Superman ordered the destruction of Coast City, Jordan went insane with grief and, shortly after, became the multiversal threat known as Parallax. DC caused a huge controversy by turning Green Lantern evil, both in universe and out. While his comrades were shocked for years at the Lantern's turn to evil, it was later revealed that Hal's descent was actually the result of being possessed by an ancient entity also known as Parallax. After this revelation came to light, many in the hero community welcomed Green Lantern back into the fold, save for a few doubters such as Batman. Despite Hal being let off the hook, some felt that Parallax simply exploited feelings that Green Lantern had deep within. But the Emerald Knight had a brief experience with another malignant entity that may prove Hal's innocence once and for all.
Related: Each Green Lantern's Difference is Explained With One Genius Detail
In Green Lantern #42 by Geoff Johns, Philip Tan, and Eddy Barrows, Jordan faces off against Larfleeze, aka Agent Orange, the sole possessor of the Orange Lantern Power Battery. In the same way that the Green Lanterns are powered by will, Larfleeze is fueled by insatiable greed. As the two fight one another, Jordan recognizes that the battery Larfleeze refuses to let go of is helping keep his ring fully charged, allowing him to pump out hundreds of constructs. Taking advantage of a brief distraction caused by the Guardians of the Universe, Hal latches onto the battery and seizes it from Larfleeze's hands. Green Lantern
Read more on screenrant.com