• -304 DR [Year of Erupting Crypts]
  • The serpent god Sseth, an avatar of Merrshaulk, founds the yuan-ti empire of Serpentes amid the ruins of the ancient sarrukh-empire of Mhairshaulk. »

  • 10 DR [Year of Dreams]
  • The realm of Serpentes goes into rapid decline when its emperor Sseth vanishes beneath the Peaks of Flame. The once-allied yuan-ti tribes begin to feud over the succession.
    Ss'inthee'ssaree, capital city of Serpentes, falls into ruin. »

  • 1358 DR [Year of Shadows]
  • The avatar of Sseth appears briefly above the water of the Lapal Sea before battling the dinosaur avatar of Ubtao on the eastern edge of the Jungle of Chult.

    Sseth stops answering the prayers of the sarrukh of Okoth, and the sarrukh approach the divine minions of the deity Set and agree to bind their god Sseth into eternal slumber if they are granted spells and aid in their battle against the khaasta. At the end of the Time of Troubles, Set claims Sseth's portfolio. »

  • Sseth kills Vaerae and absorbs his portfolio. The snake god also appears in Chult. »

  • 1369 DR [Year of the Gauntlet]
  • Set begins to answer the prayers of his newly acquired worshippers, the sarrukh of Okoth (including the yuan-ti, who still believe their divine power to come from Sseth). These sarrukh of Okoth are lead by the legendary albino sarrukh, Pil'it'ith. They are primarily served by Scaled Ones.

    Khaastas have begun to appear in the Lake of Salt region, and the two groups continue their millennia old war. »

  • 1374 DR [Year of Lightning Storms]
  • Kythorn 16 Disaster is narrowly avoided in Chult, where the serpent god Sseth is nearly allowed to escape from his prison on the Abyss and onto the Prime Material Plane. »