Irisroth' Palace (Patreon)

It can be used as Irisroth's lair in the Realm of Flesh.

Orcus' Lair was a place where Orcus, Demon Lord of Un-death, hung his hat at the end of the day. The walls were made out of Bone, and covered in flesh, and the carpets were made of woven hair. The interior was lit by torches, but in an eerie blue flame.