According to Domine Ravia, the Nasgul believed they were created by a being known as Iheiko. He then gave them a vessel to be held by one, the Salla. (TOS comic: "Mission: Muddled") In the year 2287, the Federation starship USS Enterprise-A encountered a one-man Nasgulian vessel while en route to Casmus III. It was being piloted by Argus, who had preached against what he considered the Salla's insane holy vision, and was persecuted as a result. The Enterprise rescued Argus from a pursuing warship commanded by Kroitz of the Nasgul fleet, who proceeded to destroy his own ship by impacting the shields of the Enterprise. Shortly thereafter, the Salla himself arrived to sentence Argus and the Enterprise crew for their "crimes"; he killed Argus simply by speaking the word "death". (TOS comic: "T