The dark underground world.
Green ghostly fire drifted everywhere. Bone-spiked pyramids stood at the center of the underground plains, resembling giant dragon fruits. Two massive ancient dragon skeletons laid atop them, brought back by the Liches as decorations. It was said they fought the Dragon Clan for these bones, didn't win, but the Dragon Clan eventually conceded. The war lasted over a thousand years, and Liches, after being destroyed, simply returned to their phylacteries, rested for two years, and then bounced back onto the battlefield...The Dragon Clan was utterly exhausted and signed a peace agreement.
This was the headquarters of the Lich Council.
A name?
Oh no, this place had no name. The Lich Council held meetings for two thousand years without deciding a name, almost triggering a massive internal war over it. Finally, they temporarily shelved the naming issue.