The Hell Is This

Check the corners of the room for something well-concealed. Poke your key into any appropriately sized hole that presents itself.

You check the room for any other hole but there's nothing of the sort. All solid and hole-less.

Knock around the walls again, maybe you'll find another door.

Since last time this actually brought some interesting results, you try your hand at knocking on the walls once again.



Huh?



Well, this is new.