Tutorial:Ghast farming
Ghast farming is the practice of spawning and automatically killing ghasts, in order to obtain their drops, gunpowder and ghast tears, in large quantities.
Although gunpowder can be more easily obtained via creeper farming, ghasts are the only source of ghast tears, meaning that building a ghast farm is the only way of obtaining large quantities of ghast tears, which are useful for crafting end crystals and dried ghasts, as well as brewing potions of Regeneration.
Since dried ghasts can only otherwise be obtained from nether fossils in soul sand valleys, a ghast farm is one of two renewable way to obtain happy ghasts, the other being bartering.
Mechanics
Ghasts only spawn in the Nether in the following biomes:
Soul sand valleys are where ghasts have the highest spawn rates, so a ghast farm should be preferably built in one.
Farm designs
