Nerus

A minor Goa'uld who served Baal for many centuries. Nerus claims to be responsible for inventing many Goa'uld technologies, including a Goa'uld holographic projector (that has also been used by the Tok'ra). He prides himself with figuring out how to dial all the Stargates in the Milky Way galaxy simultaneously, as he says he did for Baal during the Goa'uld conflict with the Replicators.

Nerus was eager to meet Teal'c (the Jaffa responsible for the original uprising) and the rest of SG-1, despite the fact that he had been fighting against them for many years.

Vala Mal Doran had known of Nerus and regarded him as little more than an insignificant Goa'uld and a gluttonous pig. Teal'c was also aware of him, but saw no reason why he could not be brought through the Stargate to Earth.

Nerus was intercepted by the Ori (likely a Prior) who successfully convinced him that they were the closest thing to pure godliness, instructing him to travel to Earth and join in an alliance under the pretext of developing new technologies against them.

He pushed General Landry into destroying an Ori force field that had formed on Kallana with as much power as could be brought to bear (meanwhile indulging himself in Earth delicacies). This ploy actually strengthened the field and almost succeeded in giving the Ori a permanent foothold in the galaxy.

Afterward Nerus openly admitted his treachery to the General, looking forward to being sentenced to death, thereby ascending to the Ori. Instead, Landry placed him in a cell deep within Area 51 with instructions to be deprived of food until he came up with ways to fight the Ori.