• -2482 DR
  • Netherese wizards of House Orogoth build a fortified villa in the southern reaches of the High Moor, near the northern edge of the Serpent Hills. Several generations of Orogoths sought the power of Faerun's wyrms, and legend has it that some eventually obtained it - at least after a fashion. »

  • 523 DR [Year of Trials Arcane]
  • Nejizar, the new dark naga, establishes rule over the serpentfolk thanks in large part to its alliance with a dozen spirit naga. By this time, however, the Tricrowned Kingdom of Phalorm has claimed the High Moor and begun constructing a chain of fortresses along the western border of the Serpent Hills. »

  • 557 DR [Year of the Melding]
  • Nejizar sends yuan-ti infiltrators south to the Reaching Woods to incite the hobgoblin tribes to march against Phalorm. Ultimately the hobgoblins are repelled and the serpentine provocateurs assassinated. This defeat forces the serpentfolk of Najara to retreat into the Serpent Hills. »

  • 993 DR [Year of the Slain Mountain]
  • Many of the lizardfolk tribes that had long inhabited the northern Serpent Hills migrate eastward into the newly forming Marsh of Chelimber. »

  • 1372 DR [Year of Wild Magic]
  • The Sembian cell of the Cult of the Dragon discovers the Well of Dragons in the caldera of an ancient volcano southeast of the Battle of Bones. After dispatching the undead draconic guardian, the Dragon Cultists establishes a new cell in this ancient draconic graveyard. The Dragonwell Cell currently controls only the Well of Dragons and its immediate environs, but it soon begins to establish its claims to the territories stretching from Evereska to the Sunset Mountains and from the Serpent HIlls deep into the sands of southern Anauroch. »