Minecraft wiki entry for Best_biomes_to_play, associated text: Nether wastes are the #4 most dangerous biome, because of the lava seas, zombified piglins, ghasts and piglins everywhere, which getting attacked can knock you into the lava seas below the mass of land. Zombified piglins are neutral unless hit, which isn't a problem compared to other hostile nether waste mobs. Because of the netherrack everywhere, if a fire from a blaze or a ghast starts, it burns on netherrack forever but does not spread. Striders also spawn in the lava seas, which allows you to cross the seas more quickly as boats burn in lava and swimming over the lava with the Fire Resistance effect can take a long time and damages your armor.