Minecraft wiki entry for Best_biomes_to_play, associated text: Crimson forests are the #2 most dangerous biome in the Nether, since piglins spawn everywhere and attack you if you don't wear gold armor, and hoglins attack you on sight. The trees are also pretty thick in this biome, which the piglins and hoglins can corner you and end up killing you if you don't kill all of them in time.