I am back with another mob farm with the new 1.3 features. This is a test and this is not very efficient. I will be making a tutorial of both this and my cocoa bean farm on my youtube: www.youtube.com/user/Gat0rfanz.
If you have any ideas for other redstone, buildings, mob farms or anything else tell me below. Leave feedback.
This is 100% original and the first of its kind. I will try to contact popular redstoners to see if they can develop it more.

Additional Notes

My youtube is www.youtube.com/user/Gat0rfanz