Pyrus the Godslayer was the 700-year-old self-styled and reigning King of Terella.
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His planet once subjugated and colonized for its Naquadah deposits by the Goa'uld. His longevity was attributable to the Sarcophagus he took from the Goa'uld oppressor of his planet whom he defeated to earn himself the best highest-title of "the Godslayer". He continued to send all the Naquadah through the Stargate in an effort to deceive the Goa'uld into thinking the planet was still under their control. (SG1: "Need")
Although his beautiful eldest daughter, Princess Shyla, insisted that her father was a good man, Pyrus had become despotic and irrational by the time SG-1 visited, a side effect of continued exposure to the sarcophagus technology. The health giving effects of the sarcophagus had become increasingly less beneficial to Pyrus, prompting Shyla to prepare herself to succeed her father's throne. As a result of spending too much time in the sarcophagus, Pyrus began believing that SG-1 had seemingly been sent by some evil God. While Dr. Daniel Jackson was recovering on Earth from the sarcophagus addiction, Pyrus' artificially extended rule ended when Shyla became the next Queen of Terella on the old King's death. (SG1: "Need")