What is the source of power for the Green Lantern?
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The Green Lantern Corps ranks were decimated by the Parallax-possessed Jordan. The Corps' power source, the Central Power Battery, was drained by Jordan and destroyed, removing the original power source for the rings. One Guardian, Ganthet, survived Jordan's onslaught, and chose a young human artist, Kyle Rayner, as the sole Green Lantern of the Corps. Rayner would eventually become Parallax's nemesis, and during their first battle, Rayner intentionally triggered a chain reaction in Oa's core, causing the planet to explode.
Green Lantern Corps
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Originally, Green Lantern power rings typically held a limited charge. In earlier appearances, they required recharging every 24 hours, but more recently they possess a fixed amount of regular charge: that is, the charge is good for 24 hours of 'typical' use, but extended or extensive use will drain the charge more quickly. Green Lantern rings typically reserve a small portion of their power for a passive force field that protects its wielder from mortal harm. In dire emergencies, that energy reserve can be tapped at the expense of said protection. Power rings are usually recharged by a Green Lantern's personal battery, which looks like an old fashioned lantern made of dark green metal. The user typically points the ring towards the lantern, and usually gives the Green Lantern oath (below) while recharging the ring. These batteries are directly linked to the Central Power Battery on Oa and do not themselves need recharging.
Power ring (DC Comics)
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Guy Gardner was trained to use a Green Lantern power ring, which is only limited by the user's will power. He later acquired Sinestro's Qwardian power ring, which was later revealed to be based on the bearer's control of fear. This early version of a yellow power ring was powered by absorbing plasma radiation that had been expelled from a Green Lantern ring and seemed to make Guy more invulnerable than a normal Green Lantern power-ring. He used both for basic Lantern abilities including constructs, flight, and energy projection, though it also caused him some difficulty on occasion. For example, if he asked it a question he would get an answer in Qwardian, which he didn't speak. In "Green Lantern: Rebirth" #6 it is mentioned that Guy Gardner's ring is constantly sparking with energy, as if unable to contain the power of his will. Following Kyle Rayner's apparent death, Guy's rage caused a red power ring to latch onto him, bestowing on him the ability to generate napalm like flames that would burn even in space. Unlike most Red Lanterns, Guy retained his intelligence, and, like Hal Jordan when he was under the thrall of a red ring, Guy was able to shape the red flames into solid constructs. Unlike Hal, Guy's green ring remained active, allowing him to combine the two lights and obliterate the Black Lanterns and their rings. Guy was also the first male character seen to wield a love-powered Star Sapphire ring, wearing it in conjunction with the Red Lantern ring (he stated that the result felt like he had blood and sugar in his mouth). During the events of the "Green Lanterns: The Lost Army", Guy created a new uniform using both his green and red rings. Later during the final battle, the Power Converters used by Lightsmiths, converted Guy's Red Lantern Ring to a Green Lantern ring, thus ending his connection to the Red Lantern Corps.
Guy Gardner (comics)
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While the Black Lantern Corps are powered by the black emptiness of space which represents death and therefore does not belong to the Emotional Spectrum, Black Hand is revealed to be the physical embodiment for these corps, in the same manner that Ion is the embodiment of willpower for the Green Lantern Corps. During the climax of "Blackest Night #8", Boston Brand tells the Corps' leaders that Black Hand is the "tether keeping Nekron within our world", and that as the avatar of Death he is also the only key to defeating the Black Lanterns permanently. Using the White Lantern power of Life, Hal Jordan commands ""William Hand of Earth - Live"", resurrecting Black Hand and removing him as the Black Lantern Corps' primary power source - which deals a crippling and eventually fatal blow to the Black Lanterns.
Black Lantern Corps
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On Qward, the Weaponers bestow Sinestro with the yellow ring and battery, the latter of which resembles Ranx the Sentient City. Using its power, he lays waste to Oa, the yellow light easily overpowering the Green Lantern rings. The yellow battery destroys the green battery, rendering all the Green Lantern Corps' power rings inert and causing death by asphyxiation of countless Green Lanterns who were in space at the time of their rings' failure. Jordan, having recovered his ring moments too late, finds the battery and pounds on the inert green element. He places his ring on the small crack that appears, absorbing the whole of its power. Imbued with the full might of the green energy, he destroys the yellow battery by crushing it between two moons.
Green Lantern: First Flight
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As Hal accepts the offer to act as the leader of the Green Lantern Corps, all the corps started experiencing failure of their rings during a battle with Larfleeze. They then face an unexpected threat in the form of Relic, a resident of the universe that existed prior to this one, who seeks to destroy the various Corps in the belief that using the powers of the emotional spectrum drains an emotional 'reservoir' and hastens the death of the universe. Relic goes on to shatter the Blue Lantern power battery, new home world killing all Blue Lanterns except Saint Walker. Following this, Relic, wielding lantern draining technology, destroys Oa and the green lantern power battery. Relic is proved correct as it becomes clear that the universe is coming to an end due to lanterns using the power of the emotional spectrum so he heads off to the Source Wall to save reality. To help fight Relic, Hal recruits now Red Lantern Guy Gardner. After joining with the Green Lanterns to fight Relic, Hal promises to give the Red Lanterns a sector for them to watch over. Unwittingly, this sector becomes Sector 2814, where Earth resides, giving guardianship of Earth to the Red Lantern Corps. With Relic trapped in the Source War it is Kyle Rayner with the entities (except Parallax) who is able to use his White Lantern status to replenish the emotional reservoir beyond the Source Wall.
Green Lantern Corps
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Before any other sentient beings existed in the universe, a race of beings calling themselves the Guardians of the Universe harnessed the power of the "green element", the greatest power in the universe, to create the Green Lantern battery. However, the battery was vulnerable to the color yellow, the one part of the light spectrum that could resist green. The Guardians hid the most concentrated source of yellow energy, the "yellow element", to prevent others from using it against them.
Green Lantern: First Flight
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Ion has since returned to the Green Central Power Battery, only leaving it when the battery itself forcefully removed the green entity from it because it was suffering from a strange illness. When Relic, a native of a prior version of spacetime, began a quest to prevent the harnessing the Emotional Electromagnetic Spectrum energy, he revealed that the Emotional Spectrum had a reservoir that was becoming exhausted and it would eventually destroy the Universe. After Relic wiped out the Blue Lantern Corps and forcefully drained the green light from Oa's Central Power Battery and destroying the planet in the process, Ion sacrifices himself by passing into the Source Wall in order for the reservoir to be refilled.
Green Lantern Corps
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In the lantern's story, Yalan Gur was once one of the greatest of the Green Lantern Corps, and, in the 10th century by Earth reckoning, the Guardians of the Universe chose to remove the customary weakness to the color yellow from his power ring. Without this limitation, however, he was corrupted by his power, and he came to Earth and enslaved the people of China. The Guardians of the Universe thwarted Yalan by adding a new weakness of wood to his ring, which allowed the club-wielding villagers to overwhelm their oppressor and mortally wound him. The dying Yalan Gur fled into Earth's upper atmosphere, where he merged with his lantern-shaped power battery as he died. His lantern then collided with a fragment of the Starheart and was merged with its magical essence, turning into the Green Flame that becomes the source of Alan Scott's power. The retcon involving the true reason behind the yellow impurity may mean these events have been retconned out of existence.
List of Green Lanterns
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When Kyle Rayner breached the Source Wall it is revealed that he acquired the Life Equation and when Highfather of the New Gods on New Genesis discovers this he believes it is the weapon he needs to defeat Darkseid. Also the fact that mortals wielding of the emotional spectrum could have access to such power Highfather declares war on all the Corps across the universe. The New Gods quickly incapacitate all the corps forcing the Green Lanterns to ally with the Sinestro Corps even including The Weaponer to help save the Star Sapphires and Indigo Tribe. When the combine corps attempt to attack in force against the New Gods they are betrayed by the Indigo Tribe and imprisoned. Soon Kyle Rayner is tricked by Highfather into gaining the Life Equation intending to take the fight to Earth, then convert the planet and universe into an army to fight Darkseid. After receiving help from some New Gods especially Malhedron who disagree with Highfather, our heroes escape striking back against the New Gods waiting for reinforcements from Hal Jordan. Hal recruits Black Hand who creates an army of Black Lanterns from the titans held in the Source Wall and transported to New Genesis thanks to Sinestro. Unable to stop these Source Titans the New Gods are defeated but soon Black Hand loses control when the Sources Titans come back to life. Meanwhile, the Templar Guardians reveal that Kyle Rayner still has the Life Equations within him and takes the power off Highfather, teleporting away the Source Titans. Relic is also restored to life escaping and the Sinestro Corps retreats leaving the New Gods to their fate. With New Genesis falling from the sky Hal Jordan lands the island with help from restored Blue Lantern Saint Walker. Highfather realizing he is becoming like Darkseid ends the war with the Corps and apologies unable to change his actions. The Green Lantern Corps returns home to Mogo.
Green Lantern Corps