Minecraft wiki entry for Dark_Forest, associated text: Although players are unlikely to run out of wood in dark forests, survival can still be more difficult compared to other forest biomes. The dense leaf canopy can diffuse skylight sufficiently for hostile mobs to spawn during the day in some spots. Additionally, hostile mobs can spawn atop huge mushrooms and suddenly fall near to the player. Woodland mansions are dangerous to explore without adequate preparation, due to their large size and the difficult Illager and other hostile mobs inside. The high density of trees can easily lead to players getting lost unless trails are marked using torches or other distinct markers. Using flint and steel in these biomes can help to clear out some trees due to their flammability.