Jeremiah Jason is the adopted son of Linden Avery. His natural mother Marsha Jason joined the Community of Retribution and participated in the bonfire ritual. He was adopted by Linden shortly after. After the incident he develop a sort of dissociative disorder. In which during his mind would wander to the Land as an escape. Which then enabled him to construct Revelstone and Mount Thunder out of Legos. During his time in the Land, he learned magic and was able to create constructs.
The Runes of the Earth[]
Ten years have passed for Linden Avery; and in that time, her life has changed. She has adopted a son Jeremiah, now fifteen, who was horribly damaged during her first translation to the Land, lossing half his right hand and apparently all ordinary use of his mind. He displays a peculiar genuius: he is able to build astonishing structures out of such toys as Tinkertoys and Legos. But in every other way, he is entirely unreactive. When Linden goes to the hospital to deal with the aftermath of Roger's attack, Roger takes Jeremiah as well. Separately Linden and the police locate Roger, Joan, and Jeremiah. But while Linden confronts Roger, Joan is struck by lightning, and Roger opens fire on the police. In the ensuing fusillade, Linden, Roger and perhpas Jeremiah are cut down: and Linden finds herself once again translated to the Land, where Lord Foul's disembodied voice informs her that he has gained possession of her son. From the battlements Lindn sees four Masters racing to reach Lord's Keep ahead of the Demondim. With the Masters are Thomas Covenant and Jeremiah. And Jeremiah has emerged enthusiastically from his unreactive passivity.
Fatal Revenant[]
It appears that Jeremiah and Thomas Covenant have ridden into Revelstone, despite the voice of Thomas Covenant previously telling Linden to 'find me.' The behaviour and demeanour of her two loved ones arouse suspicion and doubt in Linden.
The Masters (haruchai) act as hosts whilst the group are in Revelstone. Avery seeks to wash away some of the effects of her adventures and "Kevin's Dirt" by bathing in the Earthpower-rich lake above Revelstone, called Glimmermere. It is there that the ever-conflicted Esmer informs Linden that she must be the "first to drink of the Earthblood".
Linden returns to Revelstone and accomplishes her immediate goal of cutting off the Demondim's access to a fragment of the Illearth Stone, but shortly afterward she is transported thousands of years into the Land's past by the forms of Thomas Covenant and Jeremiah. Covenant reveals to Linden that he and Jeremiah plan to partake of the Earthblood in an attempt to thwart the dire plans of both Lord Foul and Kastenessen, the renegade Elohim. However the trio soon encounter a mysterious and knowledgeable character dubbed "the Theomach", a puissant figure who is a member of a learned race known as the Insequent. Linden is informed that she must be careful not to upset the Law of Time whilst journeying through this age.
Linden and her companions encounter the Land's ancient hero, Berek Heartthew, the Lord-Fatherer, and his sorely depleted army. The Theomach guides Linden through this meeting, mindful that their presence in this time could have a profound effect on the Law of Time. It is during this meeting that the Theomach reveals the Seven Words of Power to Berek. The Insequent explains Avery's odd appearance and presence by dubbing her the first of the "Unfettered Ones", thus keeping the Law of Time intact. Berek senses Linden's White Gold ring, which turns out to be the Land's first encounter with the powerful alloy.
Linden, Covenant and Jeremiah depart Berek's camp, leaving the Theomach behind to fulfill his chosen role as Berek's guide.
Whilst Covenant and Jeremiah attempt to teleport the trio to Melenkurion Skyweir, the source of the Earthblood, Linden is separated from them, and finds herself lost amongst the ancient forest of Garroting Deep. Here she encounters an ancient race, the Viles.
Avery knows from her time in the Land that the Viles will be corrupted by Lord Foul's Ravers in the centuries to come; eventually they will spawn the Demondim, who in turn will spawn the Ur-Viles and Waynhim. During this encounter Linden risks the Law of Time by attempting to dissuade the Viles from their path of self-loathing, informing the Viles of the Raver's part in their corruption. However in the midst of her revelation, Covenant and Jeremiah contrive to instigate a confrontation between the Viles and Garroting Deep's puissant Forestal, Caerroil Wildwood. During ensuing battle, Linden is reunited with her two companions, who hasten her towards Melenkurion Skyweir.
The trio enter the caverns of Melenkurion Skyweir. Linden's doubts and misgivings concerning her companions reach a crescendo, and as the three approach the Earthblood, Linden resolves to partake of the powerful, wish-granting substance before Covenant or Jeremiah.
Once she has drunk of the Earthblood, Linden commands that the truth be shown concerning her companions. Instantly their true forms are revealed; Thomas Covenant's son Roger Covenant has been wearing the guise of his father, whilst Jeremiah is shown to be under the malign influence of a croyel. A raging battle takes place in the caverns of Melenkurion Skyweir, during which the ancient mountain is torn asunder. Roger Covenant and the croyel-driven Jeremiah eventually escape, leaving Linden in a state of despair.
Against All Things Ending[]
While Linden's companions are held enthralled by the wonders of the Viles' ancient abode, The Harrow leaves them to take Jeremiah for his own ambitious schemes. There, he confronts the croyel, which hides in one of Jeremiah's constructs, designed to conceal it from the Elohim (who had previously told Linden they were unable to free her son). Liand attacks it, and the croyel nearly kills him. The Harrow believes that due to this construct, the croyel will be unable to summon aid - meaning Roger (who was gifted one of the mad Elohim Kastenessen's hands, and therefore has some Elohim powers). However, the croyel surprises him by summoning skest instead, and the party are nearly overwhelmed. In desperation, Linden destroys the construct, which immediately allows Roger to transport himself to the fight, where he promptly murders The Harrow. Before Roger can claim the Staff and Ring, however, his father intervenes, battling against him with Loric's Krill. Through the Krill, Joan exerts her power to harm Covenant, and his hands are so badly burned that Linden is later forced to amputate his remaining fingertips. With Stave's aid against the croyel, Linden is able to combine forces with Covenant to force Roger to flee. At last Esmer arrives, with the Ur-viles and Waynhim, and prevents Roger from fleeing with Jeremiah. Covenant is able to capture the croyel using the Krill, and Esmer takes Roger and transports him away from the fight; he shortly returns with a group of Waynhim and ur-viles, who assist the party to escape.
The conflict of these forces awakens She Who Must Not Be Named. Linden and her companions follow the Ur-viles and Waynhim in seeking a way out, and rely heavily on the strength and endurance of Ironhand Coldspray and her Swordmainnir. By holding the croyel at bay with the threat of Loric's Krill - one of few weapons that can slay the monster - the party are able to bring Jeremiah and the croyel with them. The Skurj also arrive to worsen the situation. Exposed by her EarthSight more intimately to the bane's evil than the other party members - and being a more ready target due to her family history of abuse and despair - Linden's hope finally fails when the party is cornered, and she falls into a catatonic state, deeply traumatized. Covenant first tries to reason with She Who Must Not be Named, then tries to convince Esmer to reveal her true name which would release her. When Esmer refuses Covenant asks Anele to use Liand's orcrest stone to summon the spirits of his parents, Sunder and Hollian. They leave, however, and summon High Lord Elena's spirit as bait for She Who Must Not Be Named. This ploy succeeds at delaying She Who Must Not Be Named from attacking the group. As Elena is being consumed Covenant convinces Esmer to leave them, which allows the Ardent to transport the company away.
The Ardent transports the group to a location near Landsdrop. The Ardent can no longer assist them since he failed to protect The Harrow, and begins to madden and die, though through him the race of the Insequent announce that he has become the greatest among them. Somewhat later, as a final service to Linden, he transports the Cords to Revelstone, so that they might convince the Masters to march against the Sandgorgons and Skurj that are attacking the Upper Land. In the meantime, the party rest and recuperate from their narrow escape from death. Linden is recalled from her catatonic state by Covenant, but her yearning for his love is (from her point of view) spurned. She grows bitter towards him as a result, and refocuses herself on the plight of her son.
After a failed attempt by Linden to free Jeremiah from the croyel - during which the flames of Earthpower which she draws from the staff are tainted black, apparently permanently - the group are attacked by caesures, brought on by Joan's awareness of Linden's attempted use of wild magic. No less than six caesures assail the company, and in the chaos Anele touches the dirt and is possessed by Kastenessen; the mad Elohim immediately kills Liand in an effort to protect the croyel. After Linden quenches the caesures, the Giants and Stave construct a rocky cairn for the slain Stonedownor, whose lover Pahni is inconsolable. The devastated group is soon attacked again by Roger and an army of Cavewights. During the battle, Galt sacrifices himself to protect Anele, indicating an alteration in The Humbled's stance towards the menace of his Earthpower. Anele then uses Liand's Orcrest and sacrifices his life to both slay the croyel, and to transfer his innate Earthpower, and heritage as the "Last hope of the Land", into Jeremiah.
In the battle's aftermath, it is revealed that Jeremiah remains locked in his isolated mental state, and that Galt was actually Stave's son, though the two had become estranged by Stave's repudiation of The Masters. As for Esmer, the tormented half-Haruchai begs Linden for the release of death, but she cannot bring herself to do it, though the required weapon, Loric's Krill, is at hand. Stave sees this and kills Esmer as an act of mercy - upon both Esmer and Linden, so that she would not have to. Finally, through the offices of the Giants, whose gift of tongues is restored upon Esmer's death, Linden is finally able to communicate with the ur-Vile Loremaster, who she thanks and promises to give assistance to at some later time. The Demondim-spawn then depart.
Abruptly, Covenant leaves with the two remaining Humbled to confront Joan. Linden and her companions follow the Ranyhyn, trusting the wise horses to know best what they must do next to confront the Land's doom. They lead Linden to a quarry of bones named Muirwin Delenoth. The bones belonged to Quellvisks, an extinct race of monsters that Lord Foul created in an attempt to rouse the Worm by attacking the Elohim (this plot failed, and the Quellvisks were eradicated by the Elohim). Unprompted, Jeremiah begins building a construct with the Quellvisk bones, somehow using the ancient lost craft of anundivian yajna. The group are promptly targets for more than one foe: Joan begins assailing them with caesures, and shortly afterward Infelice appears and attempts to stop them. She hints that Jeremiah's construct will capture the Elohim, which she cannot permit. She describes his actions as "ruin incarnate". She also warns that Lord Foul's "deeper purpose" (which he hinted at when Linden was summoned in Runes of the Earth) is to use Jeremiah's power, after the fall of the Arch of Time, to create a prison for the Creator, allowing Foul to rule all universes. This, at last, is what has long been hinted at in references to "the shadow on the heart" of the Elohim: Infelice insists that Jeremiah's building must not be completed. In exchange for Linden stopping Jeremiah, Infelice offers a promise of the Elohim's protection for the boy, to ensure he does not fall back into the Despiser's hands. Linden refuses the bargain, and as a caesure attacks, Infelice binds Linden and Stave with enchantment, and moves to attack Jeremiah. However, Stave and Linden resist, and with the assistance of the Ranyhyn, Linden is able to throw Jeremiah's old toy race car (that Esmer had previously repaired) to her son, who uses it to complete his construct. Infelice vanishes, presumably ensnared by the construct, and Jeremiah is simultaneously freed from the prison of his mind. At last he and his mother share an embrace, and Linden is able to believe "that her rent heart might heal".