They remain there for years until an experimental dimensional transponder used by the Secret Society of Super-Villains disrupts the stability of the Crime Syndicate's prison.

Power Ring and the Crime Syndicate are destroyed by waves of anti-matter, unleashed by the Anti-Monitor in his attempt to control all of existence.

Years afterwards, a strange disruption in reality (featured in Animal Man by Grant Morrison) brings back Syndicators Ultraman, Power Ring, Johnny Quick, and Owlman, as well as other variations of the Justice League.

[2] Eventually, the Crime Syndicate were re-imagined as being from the antimatter universe and Power Ring resembles a blonde Kyle Rayner.

After invading the other universe, Power Ring is defeated by Aquaman, as the nature of the Earths gives native beings an advantage.

The names of the characters and the team are not mentioned in the two panels in which they appear, but the altered Green Lantern is visually similar to Power Ring.

[4] Based on comments by Grant Morrison, this alternate universe is not the Pre-Crisis Earth-Three, making this a new character unrelated to previous versions.

[5] In Countdown #31, he is confirmed as being called Power Ring, a member of the Crime Society, alongside Ultraman, Superwoman, and Owlman.

Ultraman mentions that Power Ring's transformation into a Hal Jordan analogue (as well as the Kyle Rayner analogue's transformation into John Stewart in the Syndicate Rules storyline) had happened suddenly and with no explanation, but notes that Power Ring is now once again in his "original" form (mirroring the mainstream DC continuity, where Hal was the first modern Green Lantern).

He immediately attacks the Justice League upon arrival, knocking them all down with an energy blast while Harold nervously questions whether the area is safe.

[13] During the "Forever Evil" storyline, Power Ring accompanies Deathstorm in his raid on Belle Reve and destroys the roof to free its inmates.

[14] Later, again accompanying Deathstorm, Power Ring attacks the Rogues, who have refused to cause mass deaths in their own city, against the Crime Syndicate's orders.

Harold continues to live in the Green Realm, having given into fear long ago he chooses to hide in the dirt with the other power ring bearers but finally free from the torments inflicted on them by Volthoom.

The Ring of Volthoom, which feeds off fear and had abandoned Harold after his death during the Crime Syndicate's incursion to Prime Earth, is able to locate her due to her trauma.

With Cyborg's help, Jessica is able to momentarily take control and saves the Flash from the Black Racer by allowing the incarnation of death to apparently kill her.

Although he eventually paid off the debt the man's son acted as if he controlled John, to the point of blatantly committing crimes in front of him.

John beat the loan shark's son in an alley when a sentient power ring appeared before him and invited him into the Emerald Knights.

[21] Following the invasion, Emerald Knight declares Coast City beyond the jurisdiction of all Earth's authorities and seals it off from the world in a gigantic forcefield.

John tries to visit Liza, but when she is terrified of him and tells him to leave, he realises Sinestro is right and joins Alexander Luthor's Legion of Justice much to his Ring’s disapproval and annoyance.

Power rings allow the user to fly and to cover themselves and others with a protective force field, suitable for traveling through outer space.

They can also generate beams and solid structures of energy that can be moved simply by thinking about doing so, enabling the user to create cages, transportation platforms, walls, and battering rams.

The ring can place people in a hypnotic trance, show other Earths and enable people to travel between them, even drawing them if the user is on another Earth; in 'Darkseid War', Grail, the daughter of Darkseid, states that the ring is a tether to Earth-Three and assaults its host to open a portal to Earth-Three, which allows the Anti-Monitor to cross over onto Earth-Zero.

Justice League of America #50 seems to imply that Volthoom is the antimatter equivalent of the Starheart, which bestowed its power on Alan Scott and Jade on New Earth.

Volthoom causes the host tremendous pain to the point where Harold Jordan was actually relieved when Sinestro sliced off his arm and the ring left.

In the multiverse reboot, Volthoom is now the sentient power ring granted to the Emerald Knights by the Overlords of Oa, the Earth-3 equivalent of the Green Lantern corps.

In later stories like The New 52, the ring would typically reserves a small portion of their power for a passive force field that "protects the wielder from mortal harm".

These effects were displayed through grotesque, greenish veins being visible on Power Ring's right hand and arm, extending to his neck.

The same deformation was visible (to a much greater degree, resultant of a longer "bonding" period) on Power Ring's predecessor, Abin Sur.

[26] The Outsider also mentions to Pandora that Harold Jordan, along with the rest of the Crime Syndicate, know how to kill immortal beings such as herself and have done so many times.

[27] A version of Power Ring corresponding to Hal Jordan appears in Lego DC Super-Villains, voiced by Dee Bradley Baker.