Minecraft wiki entry for Player_versus_Player, associated text: Also, keep flint and steel, along with fire aspect swords and bows, along with you. And if you find generation errors that create gateways to the Void, use them. Don't forget to keep your dispensers loaded and ready to fire with arrows, damage splash potions, and fire charges. The reason why this equipment and these traps can beat people in diamond is because they go right through their armor. Nothing, not even diamond armor, can resist their effects (except for arrows. Fire, potion effects and Void damage are the only lethal things unaffected no matter what kind of armor.). Also, a potion of invisibility will mean no one will know where you are attacking from!