Ugolegndar appears to be a 9' tall, pale-skinned bipedal figure with no hair. Its skin is wrinkled in places, but mostly it appears smooth. It has no head; instead, a short tentacle protrudes from its neck where the head would be. Its five arms (two right, two left, one back) are long and thin, ending in long, sharp claws. Each hand has a milky blue eye in its palm. The feet of Ugolegndar appear to be naked bear claws at the end of two average-proportioned legs. In its stomach is a massive maw lined with teeth, thousands upon thousands of teeth. It has nine tongues, each one a deep, bloody red. When it speaks, it makes no sound. Words simply form in the mind, but the voice is deep, unnerving, inhuman, cold, draining to hear. When it roars, its roar can be heard deep through the cosmos. Its breath stenches of sulfur. Those who might sense its emotions would feel only envy of those who are not as it is.

The reek of Ugolegndar's breath is poisonous. It can belch out gouts of yellow hellfire, and its eyes can unleash green, Eldritch lightning that tears Names apart. Any eaten by its vast maw will find their souls devoured as well, and their minds will linger in the stomach long after their body has dissolved. It can unleash a wave of infernal power, summon protodemonic servitors, the Ath'scha, and control common demons. Any who hear its voice in their minds might become enthralled by its might or driven into uncontrolled terror. And its touch burns with the cold of the coldest emptiness of space.

It will grant subtle power to its followers.

Ugolegndar represents ruthless ambition, exploitation and abuse, manipulation, control, and power. It is a being of infernal majesty. Demons bow to it. Divines fear it. All who have ever conceived of it have lingering trauma.

None know or speak the Name Ugolegndar. The Name of an Eldritch has greater power even than that of a Divine. It is known by avoidant-titles instead: 'Iilah 'Azraq Al-Eaynayn in Mahad; Mwari Ane Maziso Ebhuruu in eastern Taggarus; Theph Tā s̄ī f̂ā in northeastern Dabusen; and so on. Those few who know of it avoid referencing it as much as possible.

During the last War of the Gods, Ugolegndar was defeated by the mafi girma and sealed into a box, which was then lost. It sends out its power to its followers in order to get them to free it.