Minecraft wiki entry for Defeating_a_Nether_fortress, associated text: Although piglins don't spawn in a nether fortress, you can run into them if the fortress is in a crimson forest or nether wastes. Fight them like you would fight wither skeletons, zombies, or skeletons. Wear a piece of gold armor and keep them away from chests. Take advantage that they only have 16 health instead of 20.