Archomental

The nine iconic archomentals of Planescape. From left to right, top to bottom: Zaaman Rul, Ben-Hadar, Chan, Cryonax, Sunnis, Imix, Yan-C-Bin, Olhydra and Ogremoch.

Archomentals are a storied race of beings from Dungeons & Dragons. They are essentially the "exemplars" (gods/leaders) of the Elementals.

Dungeons & Dragons

1st Edition

Lewis Pulsipher created the first archomentals - or, as he called them, "Princes of Elemental Evil" - in this edition. They basically served the same purpose as demon lords and arch devils, but for the elemental planes of Earth (Ogremoch), Fire (Imix), Air (Yan-C-Bin), Water (Olhydra) and Cold (Cryonax). These appeared in the Fiend Folio sourcebook.

1e would later expand the roster of the "Para-Archomentals" beyond Cryonax with Bwimb of Ooze, Ehkahk of Smoke, and Chilimba of Magma. Unlike the Princes of Elemental Evil, however, these guys are just described as unusually strong and arrogant mephits.

2nd Edition

Planescape brought the archomentals back and gave them counterparts (since this was the Grid-Filling Edition), the Princes of Elemental Good; Sunnis of Earth, Chan of Air, Ben-Hadar of Water and Zaaman Rul of Fire. None of them made an appearance until the 3rd of the Planescape Monstrous Compendium Appendixes, which focused on the denizens of the Elemental Planes.

In the Planescape adventure Dead Gods, Bwimb gets offed and replaced by his daughter, Bwimb II.

The "Quasi-Archomentals" - Gazra of Ash, Crystalle of Minerals, Alu-Kahn-Sang of Dust, and Sun Sing of Vacuum- made their debut in the Planescape Splatbook "The Inner Planes". Unlike the Para-Archomentals, these guys are described more as uniquely powerful quasimentals, instead of just being mephits.

3rd Edition

The Archomentals were given their official name of "Archomental" in Dragon Magazine for this era, with the Archomentals of Evil appearing in Dragon #347 and their Good counterparts appearing in Dragon #353. The lesser Archomentals get namedropped, but nothing major - that said, a new Quasi-Archomental, Ty-h'kadi of Lightning, is named in Dragon #347's article on the Princes of Elemental Evil.

4th Edition

Mual-Tar, the Thunder Serpent in its prison.

In 4e, archomentals, renamed "Primordials", got a HUGE promotion. With Points of Light mythos styled after ancient Greco-Roman myths, the multiverse was now created originally by the Primordials/Archomentals, with the Gods coming along later and adding permanency and mortal life to everything. This ticked off the Primordials, and so they fought the Dawn War. The gods killed and imprisoned a huge bunch of Primordials, and others were corrupted into the first Demon Lords, and so the Dawn War came to an end.

Because 4e went for the Elemental Chaos rather than the rigid grid-system of Planescape and its Elemental, Quasimental and Paraelemental Planes, its Primordials were a very diverse bunch, with figures like Atropus (imagine a frigging planet made of undead flesh 'n' bone and you got the right idea), Iktha-Lau (embodiment of deep space and the empty void) and Mual-tar (a freaking huge-ass dragon-thing of stormclouds and lightning chained down by rune-etched chains with links the size of castles).

For a tentative list - and do note that some of these appeared in earlier editions as either Archomentals or elemental gods...

• Mual-tar the Thunder Serpent (“Lords of Chaos: Mual-tar,” Dragon 370)
• Erek-Hus the King of Terror: Erek-Hus cleaved the dragon-god Io into two equal halves with his adamantine axe, but was then defeated when the two halves became Bahamut and Tiamat. Source: “Dragon”, Monster Manual.
• Bryakus: Defeated by the gods long ago, the spilled blood of Bryakus gave rise to the first hydras. Source: “Hydra”, Monster Manual.
• Vezzuvu the Burning Mountain: She is trapped in a field of radiance that keeps her shifted partially out of reality, unable to affect or be affected by her surroundings. Source: Manual of the Planes.
• Balcoth the Groaning King: His head was cut off by the gods, but it continues to survive as ash and cinders in a cave somewhere in the Elemental Chaos. Source: Manual of the Planes.
• Fire Lord Imix: Primordial served by fire titans. He also has a temple of beaten gold called the Eternal Flame Pavilion in the City of Brass, and goblin cults in the world. Source: Manual of the Planes.
• Shangar the Uncrowned: Primordial served by fire titans. Source: Manual of the Planes.
• Solkara the Crushing Wave: This primordial is trapped in a glacier. Imprisoned by Melora, her exarch Sekolah, Kord, and Sehanine. Source: Manual of the Planes and The Plane Below.
• Castanamir the Shattered Khan: Primordial served by storm titans. Source: Manual of the Planes.
• Olhydra the Rain Queen: Primordial served by storm titans. Source: Manual of the Planes.
• Haemnathuun the Blood Lord: His corpse, a 1,000’ long mass of red stone, floats in the Astral Sea. The Blood Lord created the abominations known as blood fiends in his own image. The Keening Delve, near the City of Brass, was once his stronghold. Haemnathuun was slain by Bahamut, Bane, and Ioun. Source: Manual of the Planes.
• Heur-Ket: A blustery primordial of wind, thunder, lightning. Source: “Hestavar: the Bright City,” Dragon 371.
• Tabrach-Ti the Queen of Bronze: Tabrach-Ti was slain by Achra (later called Bane), the first primordial to fall in the Dawn War. Source: “Deities and Demigods: Bane”, Dragon 372.
• Piranoth the World Mover: Primordial of earth, fire and frost. Source: Revenge of the Giants.
• Tmesus the Black Star: Primordial of dissolution. Source: E3 Prince of Undeath.
• Zurtharak the Vein of Iron: A primordial who could burrow through solid stone, Zurtharak was defeated by Moradin (with the help of Kord and Bahamut) wielding the “God Hammer” Guldarak. Source: Hammer of Vengeance (avenger paragon path), Player’s Handbook 2.
• Nekal of the Glowing Deep: A primordial. Source: Concordant Leader (warlord paragon path), Martial Power.
• Ilmeth: A primordial who regretted the lives he took and was slain by his own followers in the Dawn War. Source: Vestige of Ilmeth (warlock power), Arcane Power.
• Shax the Devastator: Dead primordial of the sea. Source: Vestige of Shax (warlock power), Arcane Power.
• Atropus the World Born Dead: Possibly an undead primordial. Source: Open Grave.
• Syvexrae the Queen of Stone: A primordial whose petrified but still-regenerating body serves as Doresain’s palace in the White Kingdom. Source: Open Grave.
• Queen of Chaos: A primordial. Source: Dungeon Master’s Guide.
• Nihil: Primordial of unbeing, defeated by Bahamut. Source: The Plane Above.
• Gargash: Primordial of the Underdark, mortal enemy of (and defeated by) Torog. Source: Underdark.
• Iktha-Lau the Ever Empty: A primordial of utter cold from the darkest voids of existence, said to still roam free. Source: The Plane Below.
• Ulctilantilokla: A primordial that only partially exists in reality, birthed from the multiverse’s first dream, also roams free. Source: The Plane Below.
• Tziphal the Mountain Builder: Primordial of folding earth, petrification, and volcanoes, is said to have created many of the creatures that possess the power of petrification. He was defeated in the Dawn War and imprisoned in a barrow in the Elemental Chaos, shifted slightly into the past so the barrow cannot be tampered with. Source: The Plane Below.
• Akadi: Faerunian deity of elemental air retconned into being a primordial. Source: Forgotten Realms Campaign Guide.
• Grumbar: Faerunian deity of elemental earth retconned into being a primordial. Source: Forgotten Realms Campaign Guide.
• Istishia: Faerunian deity of elemental water retconned into being a primordial. Source: Forgotten Realms Campaign Guide.
• Kossuth: Faerunian deity of elemental fire retconned into being a primordial. Source: Forgotten Realms Campaign Guide.

There's also this big list of Primordials that appeared in "The Plane Below" sourcebook for 4e, which WoTC generously put up on their website for ease of access.

5th Edition

The original Archomentals are back in a huge way, serving as the final bosses of the Princes of the Apocalypse story book from Wizards itself. This being the Nostalgia Fueled Edition, they've reclaimed their titles of "Princes of Elemental Evil" and are once more the servants/partners/minions/spawn of Tharizdun in his guise as the Elder Elemental Eye. They have statblocks, and while they're nerfed a bit from their old forms, they can still murder whole parties thanks to their absurd AOE abilities. Cryonax isn't kicking around much, but the other four are still active and trying to vigorously expand their cults by preying on mentally unbalanced adventurers in the Forgotten Realms and Greyhawk. Cryonax does get a mention, though, as potentially being controlled by a powerful magic ring that Frost Giants spend all of Storm Kings' Thunder and Tomb of Annihilation trying to steal.

Of the primordials that originated in Fourth Edition, Maegera alone is provided a statblock in Storm King's Thunder.

Maegera the Inferno, Mual-Tar the Thunder Serpent, and Draunn the Stonemaw are listed as potential alternatives to the Princes of Elemental Evil for enemy giant cultists to serve in Bigby Presents: Glory of the Giants.

References

1st Edition:

• Fiend Folio, pgs. 31-33; Cryonax, Imix, Ogrémoch, Olhydra, Yan-C-Bin,
• I12: Egg of the Phoenix (not to be confused with R2: The Egg of the Phoenix)
• Manual of the Planes, pg. 53; Bwimb, Ehkahk, and Chilimba

2nd Edition:

• Monstrous Compendium - Planescape Appendix III,
  • pgs. 16-18 — Archomental (Evil); Cryonax, Imix, Ogrémoch, Olhydra, Yan-C-Bin
  • pgs. 20-21 — Archomental (Good); Ben-Hadar, Chan, Sunnis, Zaaman Rul
• Dead Gods
• The Inner Planes
• Return to the Temple of Elemental Evil

3rd Edition:

• Monster Manual IV
• Manual of the Planes 3e

4th Edition:

• Monster Manual 3
• Manual of the Planes 4e
• Heroes of the Elemental Chaos

Dungeon Magazine:

• Issue #37
• Issue #124
• Issue #129

Dragon Magazine:

• Issue #285
• Dragon Magazine #347, pgs. 29-41 — Princes of Elemental Evil
• Dragon Magazine #353, pgs. 43-50 — Princes of Elemental Good

Pathfinder

Pathfinder's equivalent is known as the eight twelve Elemental Lords. The evil Elemental Lords have imprisoned the good ones in magic gems, but the Pathfinder Society freed Ranginori as part of 2017's organized play season.

At the start of the multiverse, the gods created the Elemental spheres and assigned two Elemental Lords to each plane with conflicting duties to prevent no lord or plane from disrupting the balance. Unfortunately, Mortals have a bad habit of separating things into good and evil binaries, which rubbed off on the Lords. Orchestrated by Kelizandri of the plane of water, the Evil Lords imprisoned their good counterparts and became uncontested lords of thier planes with the exception of the Genie empires. This unchecked power disrupted the natural cycle so much that the planes of Wood and Metal, whose lords were not involved with the conspiracy, acutely shrank and disappeared, in no small part thanks to Ayrzul. If it was not for the fact that Air is a free element that feeds the remaining 3, the people excepted the 4 elements as the natural status quo and eventually forgot about the missing planes.

In an unheard development for Inner Plane standards, during the Adventure Path _, the lord Ranginori was freed, which sparked the freeing of the other lords, bringing back the Balance to the planes and the reemerging of the two planes everyone forgot about.

Evil

• Ayrzul, the Fossilized King
• Hshurha, Duchess of All Winds
• Kelizandri, the Brackish Emperor
• Ymeri, Queen of the Inferno

Good

• Atreia, The Lambent Prince
• Ranginori, Duke of Thunder
• Lysianassa, Empress of the Torrent
• Sairazul, the Crystalline Queen

Got screwed over by the evil lords

• Ferrumnestra, The Lady of Rust
• Laudinmio, The Sovereign of Alchemy
• Shumunue, The Carved Lady of Mimicry
• Verilorn, Lord of Wood, Custodian of Oak and Ash

These eight twelve aren't the only demigods of the elemental planes, though. Feronia is described as a neutrally aligned demigod from the plane of fire. She was once briefly the wife of Archdevil Dispater, a union that is best known for producing Ragathiel, the Archangel Empyreal Lord of vengeance and righteous RAGE.

Gallery

• 
  Sunnis, Zaaman Rul and Chan.
• 
  Ehkahk, the ruler of the Paraelemental Plane of Smoke.
• 
  Solkara, the Crushing Wave.

The Archomentals of Dungeons & Dragons
Elements	Air	Water	Earth	Fire	Ice
Good Archomentals	Chan	Ben-Hadar	Sunnis	Zaaman Rul
Evil Archomentals	Yan-C-Bin	Olhydra	Ogremoch	Imix	Cryonax