Unknown Advanced Aliens

These aliens are from an unknown galaxy in the Stargate Universe they created the Berserker Drones in a war against another unknown species, they are confirmed to be extinct (the Ursini confirmed this) the only description known is that they were humanoid.

Technology
The aliens were shown to be advanced at a time before there extinction, they had energy based pulse weapons, fast than light travel and drone technology.

culture
Barely anything is known about there culture, as both the drones and there motherships are circular it has be speculated that this was important in there culture.