Minecraft wiki entry for Defense, associated text: These will give any player trying to grief, or steal from, one of your structures, a nice shock. This turret is fully automatic, and as long as you have the arrows to support it, it will demolish anything in front of it. Fire charges can also be used if you have the resources. However, these are not recommended if your structure is made out of a flammable material, as it could set it on fire and burn it down. An easier (and lower resource cost) way to make the turrets more damaging is to put a lava curtain in front of them. This will set the arrows passing through on fire so they cause more damage.