There's a mountain in RS gold the jungle Named Blood Mountain. Its in the Wilderness so its a PKing Zone. Theres a chest on very top and it requires 5-10 keys (depending on the amount of players up to ten) to start it and you get a ticket based on the number of keys you get. Theres a waiting room to get certain lvl players you will find 7 from lvl 60-70 71-80 81-90 91-100 101-110 111-125 and one for 126 players just.
You're provided a key either red, blue, green, yellow, gray, white, black, orange, purple, or pink. You need to get all the keys to your choice of Weapon or Armor exept objects from god wars and Abyssial Whip, Granite Maul and Sheild Etc.. Missing the one of your selection.
Ranged: Any Shortbow or Longbow (exept Darkbow) OR 2000 Bronze Arrows OR 1750 Iron Arrows OR 1500 Steel Arrows OR 1250 Mithril Arrows OR 1000 Adamant Arrows OR 750 Rune Arrows OR any pair of Dragon Hide Armor OR Robin Hood Hat OR Ranger Boots. OR if you're lvl 126 and completed all Free Play quests you may pick 1 quest to complete fully (you have to have begun it)
Zammorak was looking for more folks killing each other so he created the mountain mountain. He believed that more people would kill each other from the mountain so that he created it out of the blood and bones of critters and cheap OSRS gold adventurers. Guthix helped create Blood Mountain so people would get a reasonable reward everywhere. Saradomin helped produce Blood Mountain since he'd aid all the adventurers in combat there.