Gelugons were blue and white, insectile bipeds that stood about 10.5‒12 ft (3.2‒3.7 m) tall and weighed around 700 lbs (320 kg). Their hands and feet ended in claws and their long, thick tails were surrounded in spikes. Their heads hosted a set of antenna, sharp mandibles, and a pair of multifaceted eyes.
Gelugons resented the weak and respected the powerful, regardless of their allegiances. They begrudgingly cooperated with weaker devils, seeing them as either pawns or outlets for their frustration. Their desire for the power held by the pit fiends ingrained not only diligent loyalty, but also a crippling fear of making mistakes. While ice devils still schemed to obtain souls for their masters, they avoided complex plans and attempted to delay the end of their plans until after they were promoted.
Gelugons were savage warriors that fought their enemies with their claws, pincers and tails. The body of a gelugon, but particularly the tail, was surrounded by an aura of numbing cold that slowed those they struck. They were also known to freely exude an aura of fear that caused most to run in terror, and slowly regenerated when not harmed by good-aligned spells or weapons.
An ice devil's magical abilities allowed them to fly, and manipulate the cold in various ways, but their ability to create walls of ice was particularly chilling, freezing those that approached them and dissipating into dangerously frigid air when destroyed. They had a wide variety of devils they could attempt to gate in for assistance, including lemures, barbazus, osyluths, or another ice devil.
Gelugons were goal-oriented, fighting only if needed to complete their mission but never backing away from necessary battles or easy victories. Their wicked savagery was fully displayed when they were not leading soldiers into battle, as their hatred for weakness led them to destroy their frailest foes first. They favored unarmed combat, destroying their targets with their numerous natural weapons or using their supernatural abilities to send enemy ranks into disarray. Because of the important nature of their work, it was possible that losing ice devils would be fortunate enough to have a pit fiend come to their aid. Despite their preference for unarmed combat, one in four gelugons wielded barbed spears so chilling that most were paralyzed by their frost. Their typical combat strategy was to immobilize the frontline first, allowing them to use their speed and reach to strike at softer enemies thus preventing their victims from fleeing.
— The "lesson" a gelugon needed to learn for promotion.
While gelugons are most commonly found within Cania, a great number populated the icy expanse of Stygia. A regiment of gelugon soldiers were stationed on ice floe rafts in order to defend the tomb of Levistus. Gelugons were both leaders and soldiers, a unique position among the baatezu, and were almost exclusively responsible for commanding infernal troops. Because ice devils had no qualms with sending weak soldiers to their doom, and preferred to battle alone, they made poor generals. Both powerful mortals and devils alike used them as personal guards and elite warriors.
Gelugons tirelessly pursued promotion, faithfully accomplishing their missions and collecting as many souls as possible for their masters. The fortress of Malsheem laid within Nessus and had only one portal entrance located at the bottom of a deep pit with Cania. It fell solely to the ice devils to protect the portal, and at any given time the ninth circle of Baator was protected by 9,999 gelugon guards. The pit fiends were forced to put immense trust in the gelugons and occasionally defend them when they were losing, but the formidable requirements for gelugon promotion allowed the pit fiends to safely rely upon them. Simply making it on to the list of candidates required a gelugon to serve for 777 consecutive years without making a single mistake, with most having to repeat the qualification process over nine times.
Although other baatezu occasionally visited, gelugons were the only native devils of Cania and it was said that their frigid aura was taken from the realm itself. Unlike most devils, gelugons found colder climates more hospitable, although their immunity to fire allowed them to dwell even in scorching hot regions. The humid bogs of Minauros and molten plains of Phlegethos were both physically and visually disquieting for ice devils. Gelugons possessed the ability to see ultraviolet light.
Because electricity was a glaring vulnerability of the baatezu, experiments were performed in an attempt to create gelugons that were more resistant to shock. While some tests succeeded the resulting ice devil's had their ability to radiate cold reduced. Other tests produced the opposite result, causing gelugons that were even more frigid than normal. Such gelugons were often deployed alongside yugoloth mercenaries, exploiting the daemon susceptibility to cold in order to ward off their typical treachery. Shock-resistant gelugons could be recognized by their extra antenna and transparent skin while colder gelugons were a shade of blue so bright that it never faded, even within the color-draining Gray Wastes.
Gelugons had been driven to the fringes of their frozen domain due to Mephistopheles's obsession with developing a new form of magical hellfire. Despite their self-imposed exile, gelugons were still the most numerous residents of Cania, but had been supplanted as the favorite servants of their Archdevil by beings like the pit fiends who were capable of aiding their lord's research. Although uncertain on whether to try and persuade or overthrow Mephistopheles, no ice devil openly criticized his decision, instead targeting their aggression at those who encouraged his behavior.
- Vreesar was a gelugon that led an attempt to conquer Toril from a portal in the Great Glacier in 1366 DR. He was stopped by a Harper ranger named Martine and a former paladin named Vilheim.
- Yoggaa was an ice devil wizard responsible for the upkeep of Mephistopheles's Frost Garden. The sarcastic, gelugon gardener continually blasted the sculpted plants with cone of cold spells to prevent Mephistar's strange heat from melting them.
- Tuncheth was an irritable ice devil, devoted to restoring the gelugons to their former position as Mephistopheles's favored servitors. On one front he attempted to discredit the pit fiend known as Quagrem, a key researcher of hellfire magic, by sending his agents to discover or plant evidence of foul play against him. He also was in charge of developing a theoretical form of frost magic known as the Plume, in order to end the Cold Lord's fixation on the un-Canian hellfire.
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Wizards RPG Team (2014). Monster Manual 5th edition. (Wizards of the Coast), pp. 69, 75. ISBN 978-0786965614.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Mike Mearls, Stephen Schubert, James Wyatt (June 2008). Monster Manual 4th edition. (Wizards of the Coast), p. 63. ISBN 978-0-7869-4852-9.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 Skip Williams, Jonathan Tweet, Monte Cook (July 2003). Monster Manual 3.5. (Wizards of the Coast), p. 56. ISBN 0-7869-2893-X.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Allen Varney, ed. (June 1994). Planescape Monstrous Compendium Appendix. (TSR, Inc.), p. 23. ISBN 978-1560768623.
- ↑ 5.0 5.1 5.2 5.3 Gary Gygax (December 1977). Monster Manual, 1st edition. (TSR, Inc), p. 22. ISBN 0-9356-9600-8.
- ↑ J. Paul LaFountain (1991). Monstrous Compendium: Outer Planes Appendix. Edited by Timothy B. Brown. (TSR, Inc.), p. 5. ISBN 1-56076-055-9.
- ↑ Robin D. Laws, Robert J. Schwalb (December 2006). Fiendish Codex II: Tyrants of the Nine Hells. (Wizards of the Coast), p. 60. ISBN 0-7869-3940-0.
- ↑ 8.0 8.1 Colin McComb (September 1997). Faces of Evil: The Fiends. Edited by Ray Vallese. (Wizards of the Coast), p. 23. ISBN 0-7869-3430-1.
- ↑ 9.0 9.1 9.2 Colin McComb (September 1997). Faces of Evil: The Fiends. Edited by Ray Vallese. (Wizards of the Coast), p. 16. ISBN 0-7869-3430-1.
- ↑ 10.0 10.1 Robin D. Laws, Robert J. Schwalb (December 2006). Fiendish Codex II: Tyrants of the Nine Hells. (Wizards of the Coast), pp. 55–57. ISBN 0-7869-3940-0.
- ↑ Robin D. Laws, Robert J. Schwalb (December 2006). Fiendish Codex II: Tyrants of the Nine Hells. (Wizards of the Coast), p. 46.51. ISBN 0-7869-3940-0.
- ↑ 12.0 12.1 12.2 Robin D. Laws, Robert J. Schwalb (December 2006). Fiendish Codex II: Tyrants of the Nine Hells. (Wizards of the Coast), pp. 69–71. ISBN 0-7869-3940-0.
- ↑ David Cook (December 1993). Soldiers of Ice. (TSR, Inc.). ISBN 1-56076-641-7.
Least: Advespa • Lemure • Merregon • Nupperibo
Lesser: Abishai (Black • Blue • Green • Red • White) • Barbazu • Hamatula • Narzugon • Osyluth • Spinagon
Greater: Amnizu • Cornugon • Erinyes • Gelugon • Paeliryon • Pit fiend • War devil
Alu-fiend • Archdevil • Cambion • Fimbrul devil • Hellcat • Imp • Kyton • Orthon • Seared devil • Succubus • Tar devil