Mob Bomb
By TikoluX
Please note this command will work best in a Normal world so I don't recommend using a Superflat world.
Steps:
1. Get a command block by typing this into the chat: /give @p command_block
2. Paste my command into the command block and place a redstone block next to it.
3. Open the book you got and click the red text inside it.
Hope you enjoy my command!
I made it with help of Minecraft Book Generator.