en 1.8+ /give Tools & Weapons Use the God of Hyperdeath's Staff  for strange fun, because this staff is a 1 shot to what seems to be everything.

WARNING
It is so powerful it can instantly break a full set of unbreaking 3 diamond armor. Use unbreakable modifiers to use on armor sets. Otherwise, just make a
copy in /gamemode 1. LOWERS HEALTH TO 10 HP.

Have fun murdering everything and gaining full control of your world!