Tutorials/Dungeon mob farming

Dungeon mob farming is pretty simple. You just have to find a Dungeon and make an automatic mob killer around the monster spawner.

Preparation
One of the advantages of this method is that it requires very little preparation. You only need 3-4 signs, a couple of pressure plates, a couple of water buckets and a lava bucket. Plus the basic digging gear (Pickaxe, Shovel, etc.)

Finding the dungeon
This is the hardest part of the whole project. Dungeons are fairly rare and full of mobs. First of all, you can set the difficulty to peaceful, so that no hostile mobs appear. Then just start finding a dungeon. It is up to you how you find it, some people just dig around, some people use cartograph. Once you've found a dungeon, start building the killer.

Making the killer
First you have to take out all the valuable items inside chests. Make sure that the ceiling is 2 blocks high. Then just dig a 1x1 ditch around the spawner. Pick one corner of the ditch. Then do like this: 1= 1 block deep 2= 2 blocks deep X= 4 blocks deep

1

1

2

2

X 2  2  1  1

Then you should make a lava killer and a ditch that will make goodies go collection point. I'll add it later...