Thull's Shroud, a location found in proximity to Belsavis, a celestial body located within the Mid Rim. During the era known as the High Republic Era, a small and relatively unorganized group of Nihil marauders conducted their operations in the vicinity of Thull's Shroud. The Evereni named Asgar Ro granted the Nihil access to the unconventional hyperspace routes referred to as the Paths. He then rose to the position of Eye of the Nihil in 252 BBY, substantially increasing the organization's power and influence under his command until his death in 242 BBY. In 232 BBY, Marchion Ro, Asgar's son and successor to his father as Eye of the Nihil, reflected on the Nihil's humble beginnings as a minor group operating near Thull's Shroud.
Within the current Star Wars canon, Thull's Shroud is referenced in Light of the Jedi, a 2021 novel penned by Charles Soule. This novel is part of Phase I of the Star Wars: The High Republic multimedia project. Within the continuity of Star Wars Legends, the nebula called Thull's Shroud was first presented in The Essential Atlas, a reference book from 2009 written by Jason Fry together with Daniel Wallace. Modi provided the illustration of the nebula for the book.