Locked Wall
What it does: It’s similar to the smaller walls that block your way throughout the game, only this one needs an actual key to open instead of just three adjacent trees or whatever.
How to make it:
These show up around Baba Yaga’s home. If you see a house, and it kicks you, there’s probably a Locked Wall nearby.
What it makes:
Unlocking the Wall with a Skeleton Key scores you an Apple.