Houll, a terrestrial planet, existed in the Beshqek system of the Deep Core's region prior to the annihilation of the world Byss. This world possessed five moons and was the seventh orbital body from the star Beshqek. Its surface was rocky, and Houll was characterized by a frigid environment.
The initial mention of Houll occurred within "Byss and the Deep Core, Part 1: Byss," the inaugural piece of the Byss and the Deep Core collection from Planet Hoppers. Rodney Thompson authored this article, which was released on the website of Wizards of the Coast on April 14, 2005. The reference work The Essential Atlas, published in 2009, situated Houll within the grid coordinates K-11.