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H'Catha was the eighth and farthest planet from the Sun in Toril's solar system, also known as Realmspace.[3] Seen from Toril, it appeared as a crystalline glimmer of diamond white, although sometimes it was reported to appear as an emerald green star.[4] It was the last of the Five Wanderers, the five superior planets of the Torilian solar system.[5]


The planet consisted of a flat 300‑mile-thick (480‑kilometer) disc of clear water with a single mountain in the center. Close-up, this world looked like a giant wagon wheel, with the mountain, known as the Spindle, always pointing directly at the Sun. Over 1,000 miles (1,600 kilometers) tall and 200 miles (320 kilometers) wide at its base, the Spindle was the tallest mountain in all of Realmspace.[1]

Climate for H'Catha
Average Temperatures[1]
32 ℉
0 ℃

50 ℉
10 ℃


Because of the planet's distance from the Sun and the fact that its rotation kept it always facing the sun, H'Catha's climate was cool, with the temperature always at 50  (10 ). However, it could support a variety of life, especially in its oceans.[1] In particular, H'Cathan doom radishes were considered a very savory dish.[6]

H'Catha had two moons that orbited the planet at its equator. The closest moon's tidal forces were responsible for keeping gentle maritime currents. The water constantly fell off the edges of the planet, evaporating into a thick fog which obscured the edges and then being reabsorbed into the planet's water cycle. H'Catha's ocean had a variety of life forms. However, because of the beholder inhabitants' reckless devastation and warfare, most of H'Catha's indigenous life forms were endangered.[1]

H'Catha' Satellites[]


Main article: Turnbetl

The closest moon of H'Catha was a spherical body with a highly flammable and volatile atmosphere, which ignited with the violence of one or more fireballs as soon as put in contact with oxygen. Therefore, this moon was kept in constant quarantine and no ships dared approach it.[1]


Main article: Lumbe

The farthest moon of H'Catha was metallic and roughly cylindrical. The moon's interior, which could be accessed by two doors at opposite ends of the cylinder, was an apparently abandoned wizard's laboratory with a supply of pleasantly scented oxygen that was constantly resupplied by magic jars. Mysterious voices could be heard inside, but ceased as soon as any of the doors opened. The moon in fact belonged to a mysterious and powerful wizard named Sarelk, who had spent over a millennium combating a terrible ship of his creation called the Batship.[1]


Fan art of the planet H'Catha.

H'Catha was originally inhabited by a culture that had lost three ships trying to prove that their world was round. After the planet was taken over by beholders, the fate of this civilization was unknown.[1]

As of 1492 DR,[note 1] the planet was still ruled by beholders.[2]


H'Catha was inhabited by different species of beholders, constantly fighting against each other for supremacy and control of the Spindle. This war consumed the entire attention of the beholders and progressively devastated the natural environment of the entire planet.[1]

Near the base of the mountain, six ports, each owned by a different beholder type, accepted spelljamming traffic from other beholders, as long as they did not come from any of the other warring factions of the planet, which would immediately provoke a war. The beholders were also friendly with the Arcane. Other species were only allowed to land if they had goods to trade and left as soon as they were done.[1]

In the early 1360s DR, a group of scro survivors of the Second Unhuman War were captured by the beholders of H'Catha, but their fate was unknown.[7] By the late 15th century DR, a community of orogs dwelt in a cavern system deep underground on the planet. Some of those orogs turned to piracy aboard the squid ship Scavenger.[2]



  1. Canon material does not provide a year for the events described in Waterdeep: Dragon Heist, but Christopher Perkins answered a question via Twitter and stated the year was 1492 DR. Corroborating this, Dragon Heist page 20 refers to events of Death Masks (set in 1491 DR) as being "last year". Unless a canon source contradicts this assertion, this wiki will use 1492 DR for events related to this sourcebook and Waterdeep: Dungeon of the Mad Mage (which is referenced on pages 5 and 98 of Dragon Heist).


Referenced only
Waterdeep: Dungeon of the Mad Mage
Video Games
Spelljammer: Pirates of Realmspace


External Links[]

Disclaimer: The views expressed in the following links do not necessarily represent the views of the editors of this wiki, nor does any lore presented necessarily adhere to established canon.



The SunThe SunAnadiaAnadiaColiarColiarTorilTorilKarpriKarpriChandosChandosGlythGlythGardenGardenH'CathaH'CathaRealmspace-2e-crop.jpg
The sunAnadiaColiarToril/Abeir (SelûneTears of Selûne)KarpriChandosGlythGardenH'Catha
Comets: K'ThoutekKing-Killer Star
Nebulae: Galleon NebulaColor Spray Nebula
Far Realm-infested stars: AcamarCaiphonDelbanGibbethHadarKhiradNihalZhudun
Other astronomical bodies: Caer WindlauerSkull of the VoidSargassos
Moons of H'Catha