Parallax is a fictional comic book supervillain in the DC Comics universe. Created by writer Ron Marz and artist Darryl Banks for Green Lantern vol. 3, #48 (January 1994), Parallax was originally devised as the new supervillain identity for then-former Green Lantern protagonist Hal Jordan. After further changes for the Hal Jordan character over the subsequent years (sacrificing his life in order to reignite Earth’s Sun in the 1996 crossover storyline "The Final Night", and Jordan’s soul subsequently becoming the newest host of the Spectre in the 1999 miniseries Day of Judgment), 2004's Green Lantern: Rebirth once again cast Jordan as a heroic Green Lantern and explained Parallax as an ancient entity embodying the yellow light of fear which possessed Jordan and drove him to villainous action. Parallax was revealed to have been once imprisoned within the Central Power Battery on the planet Oa, from which all Green Lanterns derive their power, and was the reason for the yellow impurity that in the past rendered the rings useless against anything yellow.