Netherskull

Netherskull was a death tyrant in Undermountain in the early 1490s DR.

History
Many years before Year of Three Ships Sailing, 1492 DR a beholder went to Undermontain from Underdark. There it settled inside the Obstacle Course level and turned itself into a death tyrant renaming itself Netherskull; then it fought Halaster Blackcloak but the Mad Mage prevailed. However Halaster decided to not destroy the Netherskull instead turning it into a dungeon guardian. So Netherskull become the lord of the Obstacle Course level permitting to Halaster to install his new magic traps here. Around 1392 DR the Netherskull battled the paladin Fidelio, that however turned into a ghost and fought the Netherskull many times.

Activities
Netherskull resided inside its sanctum, where risen all it defeated foe into zombie at it service. Near was a immense chasm created by it's disintegrate ray that Halaster had flooden with lava.