TokTz-Rok-El is the hardest boss in RuneScape. You must have the Tokhaar-Kal to be worthy enough to challenge it. In TzHaar City if you check the statue in the middle then use the Tokhaar-Kal on it you will be teleported to the TokHaar Colosseum (TokHaar-Tol) in which you must fight the Champion (TokTz-Rok-El), there are no waves, just the TokTz-Rok-El. Reward - 1,000,000 Tokkul, 999,999 coins and have the ability to choose a very powerful cape, Toktz-Ol or a Tokhaar-Ol. One of them's magic/range cape (Toktz), and the melee cape (Tokhaar-Ol).