Edit by RedQueen: Warning! This is a forbidden ritual! For the reasons, please look into the according thread.
Found another one! Again, I'm not exactly sure what it does! :/ Probably something to walls. I think it makes them phase out somehow so you can walk through.
EDIT: It appears to be a ritual to create Conceptual Corruption! It is incomplete though.
First off, you take an element from that wall (like a brick or a stick if it's a palisade for some reason) and you place it in in a round metal indentation/bowl I think, like an upside-down bell, a salad bowl or a wok? Or maybe even a hole in the ground covered in aluminium foil...
Then you fill the rest of the hole up with water at exactly three degrees Celsius, right up to the rim! :0
Now here's something missing, I think it involves a wire in the basin? Afterwards you'll have to heat that water but instead of evaporating it will freeze over! As soon as it's solidly frozen, get a sledgehammer ready to smash it apart and wait exactly three minutes three seconds before hammer and ice make contact! Get all the ice smashed up and out of the bowl (the object inside too), then hammer away at the metal object until it is bent inside out!
Sound familiar? :?