Stealth

Once you reach Movement level 200 alongside a Combat level of 100, you gain the Stealth ability, which you can unlock simply by sneaking. After 15 seconds you'll become invisible exept you still give of particles. These will disappear after another 30 second of sneaking, or if your movement level is above 400. When you're in stealth mode, you'll get strength III and stay invisible until you either attack or stop sneaking.