Unwanted mobs in your world? Try this out! by bbthedestroyer

Get an instakill wand in a split second! You may see a rocket for like a fraction of a second, but that is just for the levitating effect and 

the spark. Anyway, this instakill wand does 525,000+ damage and even more against things like the Wither. Not like it really matters 

because they'll just die in one hit. Still useful though in case you accidentally spawned in my Witherstorm or something and you can't 

kill it.