"Emerald Twilight" is a 1994 comic book story told in Green Lantern (vol. 3) #48–50, written by Ron Marz, drawn by Darryl Banks and published by DC Comics. The story introduced a new Green Lantern, Kyle Rayner, who gained a significant fan following.

"Emerald Twilight" was collected as a trade paperback collection in 1994 reprinting the entire three-issue story arc in one volume as Green Lantern: Emerald Twilight (ISBN 978-1-56389-164-9), with cover art by Tony Harris. It was later collected again in 2003 as the Green Lantern: Emerald Twilight/New Dawn TPB (ISBN 978-1-56389-999-7), reprinting Green Lantern (vol. 3) #48–50 and also #51–55, the early stories of Rayner becoming the new Green Lantern with new cover art by Alan Davis and Mark Farmer.

A second collection was released in the 2017 trade paperback Kyle Rayner, Green Lantern, Volume One including Green Lantern #0 and #56–57, R.E.B.E.L.S. '94 #1 and The New Titans #116–117.

In Green Lantern #46, as part of the "Reign of the Supermen!" storyline, the extraterrestrial villain Mongul teams up with Cyborg Superman, who had disguised himself as Superman. They use a series of bombs to destroy Hal Jordan's home city of Coast City with the intention of using the area as one of four way-stations for a giant engine that will transform Earth into the massive spaceship Warworld. Hal returns to the city to find it destroyed and furiously attacks, hearing the voices of those killed crying out in his mind. The voices fall silent when Hal defeats Mongul in battle. Hal also witnesses the return of Superman, who has defeated the Cyborg elsewhere in the city.

In issue #47, he teamed up with Green Arrow for a completely different mission, and at the end of the issue, his thoughts once again turn to Coast City.

Issue #48 began with Hal in the center of what used to be Coast City, clutching the remains of a doll—the only physical evidence of the seven million people who once lived there. In a moment of pure anguish, Hal uses his power ring to re-create Coast City, down to the people who had previously died, including his father. When his ring's energy runs out, one of the Guardians of the Universe contacts him via a holographic projection to tell him he is in violation of one of the principal rules of the Green Lantern Corps, which forbids Lanterns from using their rings for personal gain. Enraged at their apathy, Hal siphons energy from the projection and makes his way to the Guardians' planet Oa, with the intent of bleeding off all the energy from the Main Power Battery to recreate Coast City.

Issue #49 saw him going up against various members of the Green Lantern Corps, each of whom fell against Hal, until he got to Oa. Hal steals the rings from each defeated colleague and leaves them for dead.

Issue #50 sees Hal battle the renegade former Green Lantern Sinestro on Oa, who had been previously imprisoned in the Main Battery, but released by the Guardians to stop Jordan. Jordan then proceeds to kill Sinestro, as well as his fellow Green Lantern Kilowog. The Guardians, having realized that their cause was lost, give all their remaining energy to the Guardian Ganthet before dying. Hal takes all the energy in the Central Power Battery, and when he emerged from it, he has a new costume and takes the name Parallax.