Xoriat, the Realm of Madness

Xoriat's bizarre geometry and unspeakable inhabitants seem like the product of an insane person’s nightmare. In this utterly alien environment, beings whose appearance can shatter a person’s sanity live in cities crafted from gargantuan, fleshy tumors. Seas of protoplasm, in a shade of purple that hurts the eyes, lap against shores of chitin. Some can look upon Xoriat and see it as a place of revelations, but most mortals who come too close to Xoriat fall prey to madness. Xoriat is the source of many aberrations, including the terrifying daelkyr.

Xoriat Manifest Zone Features
d4 Feature
1 Reality is frayed here. Casting any spell of 1st level or higher triggers a roll on the Wild Magic Surge table in chapter 3 of the Player’s Handbook.
2 A character must make a DC 14 Charisma saving throw at the end of each hour spent in this place. On a failed save, the character is afflicted with a random form of short-term madness (see chapter 8 of the Dungeon Master’s Guide).
3 Residents of a settlement here display bizarre mutations and unsettling behavior. Visitors who stay too long develop odd characteristics as well.
4 A cavern here is a cancerous tumor that issues forth aberrations to prey upon the world, and it is growing.