In DC crossover limited series such as Kingdom Come, this particular Guardian is presented as being part of the Quintessence, a group of gods who oversee their entire universe (or multiverse), yet shows signs of focusing especially on Earth.

Jordan is asked to help him battle the renegade Guardian Dawlakispokpok (nicknamed "Dawly"), who is trying to use a time machine to change history.

After the destruction of Coast City during the "Reign of the Supermen" storyline,[2] Ganthet becomes the last of the Guardians after Hal Jordan is driven insane and kills the rest.

[5] Ganthet became part of the circle of gods, including (usually) Shazam, Zeus, Highfather, and Phantom Stranger, committed to observing the universe and counselling one another.

[7] Realizing that he could not continue as Ion without losing his humanity, Kyle travelled to the recently restored Oa to recharge the Central Power Battery.

[8] After one of the children, Lianna, went missing and was later revealed to have aged prematurely, Ganthet invited the Zamarons to Oa to help raise them with him.

[volume & issue needed] When the Martian Manhunter reverted to the 'Burning Martian' identity that the Guardians of the Universe had locked away long ago and attacked the Justice League, Ganthet teleported John Stewart to safety and treated his injuries when the rest of the League teleported to the Fortress of Solitude to escape the Burning's initial attack.

[9] Ganthet was later able to tell John the history of the Burning Martians and teach him a way to 'reroute' his mind to think in the first language of the universe so that he could rescue his teammates from Fernus in a hit-and-run attack (although the intensity of this method of thought meant that John could not use it for more than sixty seconds without burning his mind out), allowing them to come up with a plan to defeat Fernus.

[10] Ganthet played a crucial role in resurrecting Hal Jordan, who was revealed to be possessed by the fear entity Parallax during Green Lantern: Rebirth.

[volume & issue needed] During the Sinestro Corps War, Ganthet and Sayd are banished from the council for embracing emotions, discovering that they have romantic feelings for each other.

[12] Ganthet and Sayd also explain to the four about the emotional spectrum created at the start of the universe that is separated into seven colors: green (willpower), yellow (fear), violet (love), red (rage), indigo (compassion), orange (greed), and blue (hope), each representing different forms of emotion, with green being the most center balanced of the energies.

They harness the blue energy of hope and make plans to create another intergalactic police force to aid the Guardians and the Green Lantern Corps in their upcoming battle against "The Blackest Night".

[14] Later, Ganthet reveals to the Blue Lantern Corps that he and Sayd are planning to create an alliance to those who wield the indigo power of compassion along with Oa.

[15] However, Ganthet, Sayd, and the Blue Lanterns find themselves being attacked by Agent Orange as the villain seeks the powers they possess; Larfleeze desires anything he does not have.

To get Larfleeze to cooperate with them, Sayd offers her servitude to Agent Orange, who expresses a desire of having his own Guardian over Ganthet's protests.

[18][19] Failing that, Ganthet duplicates Hal Jordan's ring and places it on his own finger, inducting himself into the Green Lantern Corps.

Notably, his new Power Battery lacks the ordinary, rounder design, and looks much similar to the squared, older ones once wielded by the Manhunters and the Halla's.

Ganthet is forced to admit to his fellow Lanterns that a short time ago that formed into a tapestry of future events, and that, having learned that Atrocitus had the same thing happen to him, he and Guy entered into their alliance.

[24] With Krona having returned Parallax to the Green Lantern power battery and infecting the other six remaining Guardians with the other emotional entities, Ganthet, Kilowog, and the four Earth-based Green Lanterns are the only ones even partly immune to Parallax's influence due to their prior experience under his influence, but he is still forced to take John and Kyle's rings when they are driven to attack each other.

[31] Ganthet's dismissive attitude towards his past remains even when Sayd is revealed to be accompanying Larfleeze's attack, although he appears to retain a degree of affection for Kyle, as he offers Kyle a chance to return to the Green Lantern Corps if he agrees to remain on Oa so that the consequences of his temporary period wielding the other six rings can be studied.

[43] They used their power and Kyle's white ring to open a doorway to Emerald Space in the afterlife and manages to bring Hal back to the realm of the living.

[45] While the Green Lantern Corps are reinstated, Ganthet and Sayd assign Hal and Kyle to find Saint Walker.