House Thuranni across the face of Eberron. While all members of House Thuranni are elves, not all members carry the dragonmarked Mark of Shadow. House Thuranni secetly plays host to the Shadow Network. Once, House Thuranni was part of House Phiarlan until the Shadow Schism, where they split off to become their own dragonmarked house. They are based out of Regalport in the Lhazaar Principalities, though they have enclaves across the continent of Khorvaire.