Grimrock

I have the arrow the skull and the key for the door but I don`t have the rock what do I do? plz somebody help me plz

Perhaps heading back up a few levels and grab one you left behind in case you haven't found the rock on this level

Where is the rock in this level?

Check the south-eastern quadrant past the pillared hallway.

Thanks I found it

Now I have another problem, after taking the key the walls next to me that are supposed to open they don`t open what do I do?

You need to clear the alcoves all around that central pillar, the spell scroll, the key, the book, and don't put anything in their place, the three alcoves must be empty.

What spell scroll?

it's on the north side, which is in the SW of the ice_lizard section

found it thanks