Egeria

Egeria was a Goa'uld Queen. She felt that it was wrong to use the Tau'ri as slaves and forcefully take them as hosts, so she spawned a legion of prim'ta that lacked the evil nature of the Goa'uld, becoming the Queen Mother of the Tok'ra. Ra, the Supreme System Lord of the Goa'uld Empire, learned of Egeria's actions and captured her. He removed her from her host, and imprisoned her in a stasis jar on Pangar. She was discovered by the Pangarans buried in a tomb. They then found that they could use her Goa'uld off-spring to create a drug called Tretonin. Unfortunately, Tretonin harms the users' natural imune system. SG-1 arrives and discovers the drug and process to create it, they are concern and call in the Tok'ra. The Tok'ra come to help and learn that the queen is Egeria, the mother of all Tok'ra symbiotes. Unfortunately, she dies soon after of the demands put on her by the Pangarans.

Related
Pangar