The Asurans, referred to as Replicators by the Humans, were a technological life-form originally created by the Lanteans as a means of fighting the Wraith. The Asurans, though appearing as humans, were actually constructed of millions of nanites, giving them abilities such as shape-shifting, increased strength in human form, and the ability to scatter inside a human to attack or interface with them on the microscopic level. The Asurans joined the Alliance of Nations. Desperate, exhausted, and greatly outnumbered, the Ancients resorted to using their technological superiority go give them a needed advantage by creating the Asuran race. Initially the creatures were simple nanites programmed to destroy from within, causing a brain hemorrhage in any Wraith who came in contact with them.