The Elite Explorer Quest. Prerequisites: Quests: The Fremennik Trials, The Fremennik Isles, Desert Treasure, Tourist Trap, Monkey Madness, Cold War, Heroes' Quest, In OSRS gold Search of Myreque, Priest in Peril, The Giant Dwarf, The Grand Tree, Troll Stronghold, Lunar Diplomacy, Swan Song Skills: 55 Herblore, 45 Strike, 40 Defence, 65 Range, 77 Magic, 5 Fletching, 55 Agility. 

Other: Ability to conquer a level-210 King Black Demon. Talk to him about his explorations and he will show you a particular cape that just Elite Explorers can have. He will state to earn the cape, you have to do some certain needs; Retrieve a Ghast in a bottle from Mortyania. Slay a powerful demon. Mine from the very core of the Gielenor. Traveling to an opposite measurement.

He will state once you finish this quest, he will reward you handsomly. Thus, you head out with this quest. The very first on the list would be to retrieve a Ghast. Talk to Drezel about shooting Ghasts. He'll say it is near impossible, but with the perfect spell and potion, it is possible to catch one. 

He'll say to mix a Fire Berry (a rare berry found in lava) plus a few Blemish Snail Slime in the Heroes' Quest. Then hold the bottle open and speak the words'Deom formnai sylimairel esintry!' . Once you do this, you will have a Ghast at a Bottle. To locate the demon, you have to find Glough, in the Grand Tree. He'll say he made ANOTHER demon, a stronger one, but does not know where it is. What you don't understand is that you want to walk into cheap RS gold Eagle's Peak and you'll discover it in a secret cave. You'll slay it and pick up its own head.