Simple mob shredder Not MCEdit, it is the save file!

Hey this is a simple mob shredder, if you have 12w36a there is a glitch were you can not break blocks, here are the rules, You can make buildings near it, there is a water entrance to get down into it, p.s. there are air pockets so you can get back to the top, like I was saying you can make buildings near it, as long as you create a link to this page! That is all! p.s. it is not a mcedit scemadic, it is the world save! Sorry that I have not been on in a while, but it is in adventure mode to get to survival or creative, just use the gamemode then the number to change.