You will meed these materials
- A Dispenser
- A Pressure plate (to make it to look like its invisible, use a stone pressure plate)
- 6 or more pieces of redstone dust.
- 9 to 576 arrows
First dig down 2 squares in a shape stairs and then Dig back up in the shape of stairs.
Go 2 blocks and on the 2nd block, put the dispenser.
On the stair shaped Blocks, put redstone including in front of the dispenser
Put the Pressure plate at the end of he redstone line
Put the arrows into the dispenser
Step 6 (Drumroll Please!)
Lure any mob to the pressure plate and they get hit (They will survive but it's worth it, and if you have 11w49a you don't have to lure a mob)
(Please change the name to Mob Prank)