Ultimate laggy wither storm by littlebuglet

The very laggy Wither Storm I made, basically loads of withers pulled together

Use 1.9 and a Repeating Command Block for the command

To kill the Wither Storm you need to break the command block

P.S. It keeps growing, you will probably see the wither break into clumps to (inevitably) kill you instantly. Use creative mode as command blocks have a blast 

resistance of 18,000,000. 

P.P.S. It is, as i have said twice before, is very laggy

Turn your render distance to 2 chunks to get rid of lag.