Age of Division

The period between the Great Conjunction that splits the urSkeks and the Great Conjunction that re-united them.

Age of Harmony

The period between the Great Conjunction that brought the urSkeks to Thra and the Great Conjunction that split them into the urRu and Skeksis.

Age of Innocence

The period between Aughra's birth from Thra and the first Great Conjunction that brought the urSkeks to Thra.


The name of a creature born of Thra's desire to see the world. She's a squat creature with spiraled horns and three eyes. Though blind in two of her eyes from the energy released during the urSkeks' arrival on Thra, Aughra is capable of removing her third eye and still using it to see. Aughra is wise but mysterious and knows of both science and spiritual matters.


A Y-shaped length of knotted rope with stones tied to each of the three ends. Used as a weapon, the bola can be swung or thrown, enabling the wielder to ensnare prey.

Castle of the Crystal

The urSkeks' home and the home of the Crystal. The Skeksis took control of the Castle after the Division and re-shaped it to suit their dark natures.

Chamber of Life

TekTih's laboratory underneath the Crystal of Truth. The Chamber of Life is where the Division occurred. Later taken over by the Skeksis, skekTek.


Fast-moving, furry shellfish that dwell under the Castle and in the lands surrounding it. Considered to be a delicacy by the Skeksis.

Crystal Bat

A species of winged creature that was bred and trained to carry spy crystals in their claws. Early breeds were limited to nocturnal flight only.

Crystal of Truth

A large, shining white crystal unearthed by the urSkeks upon their arrival on Thra. It emits a powerful aura of energy which is amplified during certain astronomical events.

Crystal Shard

The dagger-shaped fragment of the Crystal that was split off after the Skeksis cracked the Crystal of Truth.

Dark Crystal

The name for the Crystal of Truth after it was fractured. It is a deep violet color and emits corrupting energy.


The act of dreaming something physical into being, done by one or more Gelfling. The more Gelfling involved in a dream-etching, the more powerful the creation.


Sharing of memories via physical contact. Gelfling are able to dreamfast, as is Aughra.


A Y-shaped flute carried by the Gelfling Jen. Due to its shape, it's able to produce two tones at the same time.


Firelings are a race of creatures that live at the very center of Thra. Though they seem similar to Gelflings, their bodies are constantly on fire and emanate heat.


A small, furry quadruped with short legs and a tail and a large mouth filled with a double-row of sharp teeth. Fizzgigs are used by Podling villagers to drive predatory creatures from plant tendrils.


Huge, armored soldiers created by the Skeksis and animated by the power of the Dark Crystal. The Garthim feel no pain, know no fear and have no mercy. They are used to raid Podling and Gelfling villages, capture, kill and destroy.


Intelligent elfin humanoids, approximately three-four feet tall, with delicate features, long and pointed ears and four-fingered hands. Female Gelfling have diaphanous wings which enable them to glide short distances. Gelfling are capable of telepathic communication called Dreamfasting.

Great Conjunction

An astronomical event where the three suns of Thra appear to converge at a single point in the sky.


A Skeksis ceremony that tests the strength (and by virtue of this, worthiness) of a Skeksis disputing the claim of a rival. The combatants take turns striking a large black stone with heavy swords. The victor is the one who scores the biggest hit on the stone. Last used to determine the Emperor's successor.


A young Gelfling acolyte to the Gelfling Crystaline Eminence who oversees the delivery of offerings from the Gelfling and Podling races to the Crystal. Kensho aids Thurma on her quest to re-ignite the dying sun at the very heart of Thra.


Long-limbed creatures capable of fast overland movement. The landstriders are fierce enemies of the Garthim and will attack them on sight.


A large, semi-aquatic swamp grub used by the Podlings as a source of milk. The Nebrie also serves them as a totem animal.


Also known as the Dome of Aughra, the Observatory is Aughra's home and a place of scientific inquiry created by the urSkeks called TekTih.


A mechanical device used to chart the relative movements of celestial objects.


A peaceful race of small humanoids that resemble potatoes. They enjoy tending their gardens, throwing lavish feasts, playing music, storytelling, singing and dancing. They have little concept of history apart from the passage of seasons and use myths and stories to explain the world in which they live.


A cruel race of creatures possessing the worst traits of reptiles and scavenger birds. The Skeksis have toothy beaks, a sinewy tail and two pairs of arms (one pair is functional, the other is vestigial). They are the darker halves of the urSkeks and are the self-proclaimed Lords of the Dark Crystal.

Teeth of Skreesh

A gargoyle face carved into the base of the Castle of the Crystal, used as an outlet for waste water from the Castle.


The planet where the Crystal of Truth is located. Thra possesses a strange ecology where animal, plant and mineral share many characteristics and are sometimes indistinguishable from each other.


Thurma is a young Fireling who is sent on a quest by her people to retrieve a shard from the crystal to re-ignite their dying sun. Thurma is aided by a young Gelfling named Kensho on her quest.


The time is takes for the planet Thra to orbit its Greater Sun; a year.

Triple Suns

The Greater Sun, Rose Sun and Dying Sun of Thra. Also called the Three Brothers.


A gentle race of creatures with wizened, saurian features. They have wrinkled skin engraved with symbolic patterns, long tails, two pairs of arms and fine, long hair. They are called the Mystics by the Gelfling.


An alien race of very tall bipedal humanoids that came to Thra through an energy portal. The urSkeks are capable of such an advanced form technology that they seem to possess magical powers.

Valley of the Mystics

The valley where the urRu traveled to after the cracking of the Crystal. It's protected from intruders by a series of mystical Standing Stones.

Wall of Destiny

A dream-etched wall inscribed with hieroglyphs and pictographs describing the Prophecy that will heal the Crystal and re-unify the urSkeks.