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Darth Serpentis was a Sith Lord in the NEWBIEMODDER mod (The Trials of Darth Herrco) for the game Star Wars: Knights of the Old Republic II: The Sith Lords.
Rivalry with Darth Loqi and death
Darth Serpentis had became a rival of Darth Poxus' other apprentice, Darth Loqi. Their fight took place on the wastelands of Korriban and Darth Loqi eventually won, killing his rival and ending Lord Serpentis's life.
Serpentis's corpse remained there for years. Yet one day, another Sith disciple of Darth Poxus came to the Korriban wastelands to complete one of his four trials there to prove himself worthy of being Poxus's apprentice. This Sith was the brother of Serpentis's rival, Darth Loqi. Loqi's brother was Darth Herrco.
Herrco found the remains of Darth Serpentis and recieved Serpentis's datapad which said: "It appears Loqi has won".