Lukhtdau is a Proto-Vistari religion that originated amongst the seafaring Proto-Vistari peoples of eastern Concord around 300 BC. The first recorded example of the faith is the Dead Sky Tablet (Vistarian: Dodelucht plaat) written around 271 BC, whose Proto-Vistarian name grants the name of the contemporary religion. While the religion's original source is unknown, the faith was codified by Miel Tille following the departure of the Koers to modern day Vistaraland, with the eldest patrilineal descendant of Tille holding the title Prediker van de Oudthuisers (Preacher of the Oldhomers, or Preacher of the Concordians), which acts as the head of the faith.
Followers of Lukhtdau do not worship a deity or pantheon of deities, instead believing in the Ledicht - loosely translated to "Aether" or "Void" - as an abstract shifting consciousnesses to which spirit is ripped from in the creation of life, and is returned to after death. Lukhtdau practices do not orient around the worship of the Ledicht, rather it seeks the goal of attainment to the abstract entity through mediation and the bringing of oneself to near-death, with the belief that being closer to death allows the spirit to better understand the Ledicht, in a ritual known as the Opening.
According to the Tille Scripts, an adherent to the religion aims to become closer to the Ledicht through the mimicking of the "movements" of the abstract entity by "laying still in peace with it," with the extract believed to be the origins of both the Opening and Meditative practices. According to the Oudthuiser Church of Lukhtdau in South Hills, those who truly reach peace with the Ledicht shall hear a soft buzzing sound, which some have described as similar to a rolled "r", referred to as Ledicht's Humming. Hearing Ledicht's Humming is an important spiritual rite of passage for Lukhtdau clergy, with hearing it seen as a sign of a high level of spiritual harmony.