contructed of stank and decay and razor sharp grass
Known features of the region encountered there include:
Razor-blade grass
Acid-saturated ground
Red jungle growth
Pools or bogs capable of hiding deadly creatures
A blackstone dock reached from the River Styx
A red cave with colossal iron doors
A Mezzoloth named Abby was encountered there and offered guidance deeper into the plane.
Abby had not seen Loki or Idunn, despite the party seeking them.
The first major encounter in Cathrys involved black puddings rising from acid pools.
The terrain itself functioned as an active hazard because of acid and razor grass.
The party also encountered the Arch of Justice within Cathrys, where each traveler had to confess a deepest truth in order to pass onward.
History
At the Arch of Justice, each member of the party revealed a hidden truth before being allowed onward into Cathrys.
Upon arriving deeper within the plane, they immediately discovered its hostile terrain and were attacked by black puddings emerging from the acid pools.
Abby later informed them that they were in Cathrys and that escape from the plane was nearly impossible.
