Grimrock

Quite so, quite so. I was too skittish to go sniffing down the staircase first time I happened upon it, but well, after that it was simplicity itself.

*peers suspiciously* I must need to go over the level with a fine tooth comb again, I appear to have missed something.

I did something slightly inquisitive, and decided to dig out the circle before stepping in the circle of stones. Now the guardians can't be called! I will have to start over I fear, but just a heads up in case anyone else gets a little dig happy.