Mini Murder Fort

Want to kill some mobs?
This is what I generally make when I have a lot of spare cobble stone
You will need
2 stacks of cobble stone
A door
A crafting table
A chest
Fences
MOBS
And Any weapon of choice
( This is minecraft )

Step 1: Build a Square

Step 2: Build Up Three Blocks Add a Door and a Roof

Step 3: Make a Hole and Add a Ladder Up

Step 4: Add Fence

Step 5: Add Things That You Need to Be Equipt