Nox

The Nox are a peaceful and fairy-like people, capable of reviving the dead and rendering even large objects invisible and also indestructible because an object can pass right through the thing that the Nox is making invisible. (In one instance, a Tollan ion cannon for planetary defense). Isolationist and non-interventionist in the extreme, they feel morally obligated to help both sides of an argument, no matter if one side is thoroughly evil. Case in point, they will equally aid both the Goa'uld and the Tau'ri (Earth Humans). They will not even fight to protect themselves, however with their ability of rendering objects invisible, fight is unnecessary.

The Nox's advanced technology is shown when they revealed their floating city to the SG-1 team on the Nox's planet. They are also capable of establishing a wormhole without the unstable Whoosh like effect (The Asgard were also able to do this) and disable Stargate Command's iris while travelling to Earth.

The Nox are considered to be one of the "Four Great Races", along with the Ancients, Asgard, and Furlings.