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.

Parallax was revealed to have been once imprisoned within the Central Power Battery on the planet Oa, creating the impurity that previously rendered the rings useless against anything colored yellow.

The 2004 miniseries Green Lantern: Rebirth, written by Geoff Johns and penciled by Ethan Van Sciver, reveals that Parallax is an ancient embodiment of fear who possessed Jordan during Emerald Twilight.

[5][6] After Sinestro becomes a White Lantern, he views the history of the emotional spectrum and learns that Parallax was originally an insect before being transformed after becoming the first creature in existence to feel fear.

[7] In Brightest Day, Parallax is revealed to have been transported to the planet Ryut, where Krona imprisons it in an energy bubble.

[10] When Krona attacks Oa, he places Parallax inside the Central Power Battery, restoring the yellow impurity and giving him control over almost all Green Lanterns.

[13] In The New 52 continuity reboot, Sinestro frees Parallax from the Yellow Lantern power battery and allows it to possess him while maintaining control of his body.