The place is a a trapped room.

The roof and floor are leaking.

There are moving chains with sharp yet rusty hooks moving in various directions.

Unless ones move’s through very carefully it is likely one will get hooked on a chain and thrashed by the system.

The chains are too strong to stop them with normal strength.

There is a mechanism above which powers the chains. In the middle of the room there is a murderhole that goes up to the mechanism room.

It is connected but not the same as the Rust Monster room. There are some rustfish here, but not in large quantities.

From the other side of the room is a rusty lever that can stop the hazard.

There is silver slime here. It eats the rust fish

It eats rust and keeps things clean.

It is innocuous to flesh and stone.