F: Eat wall to make hole larger
How would you even begin to eat the wall? You don't know so instead you use EXO SWORD XVII to cut a large rectangular hole in the wall.

Seems like you found a way into the actual room. It's very dark inside but you see some objects inside that might be useful, but you can't make out exactly what they are from here.

F: Forget about that and check on the owner of the feet that you found