Dark monsters

Dark monsters are really dangerous and highest level foes of all RuneScape. They have some hitsplat called Chaos disease. Chaos disease has a purple hitsplat. If you get chaos disease all your lifepoints will go to 1 and stay there and you will get weak and you turn dark and can't even attack a dark monster while the dark monster attacks you and you die. Saradomin armour offers great protection from chaos disease.