Fringe Engineer Tezzla is a level 80 goblin quest giver located on a small platform hung with Horde banners over Aldur'thar: The Desolation Gate in Icecrown [[:File:|[, ]]]. She is the developer of infra-green technology, allowing the small base she operates from to be completely concealed from the eyes of the Lich King despite being surrounded by his minions and scanning devices. Players who have not been attuned (by Chief Engineer Copperclaw) are likewise unable to detect its presence.