Minecraft wiki entry for Nether_survival, associated text: Piglins commonly spawn in Nether Wastes, Crimson Forests, and in Bastion Remnants and are armed with either golden swords or crossbows. The adults are by default hostile, but if you have at least one piece of gold armor on they become neutral toward you, and the babies are always passive. Throwing a golden item at them pacifies them for a moment. When killed, they have a small chance of dropping their golden sword or crossbow, any armor they naturally spawned with, and they drop any picked up items. If you barter with them by throwing or using[1] a gold ingot on them, they throw something back, as seen on the bartering page. You can prevent them from spawning by thoroughly lighting up the area as they spawn at light levels 11 or below. They also run from soul fire related blocks and zombified piglins. If they go into the overworld through a nether portal, they start to shake and turn into zombified piglins shortly after.