All credit goes to the Big Guy:
Mike wrote:The Max and Completionist Capes have hereby been released!
Please note that whenever a new quest is introduced, anyone who previously purchased a Completionist Cape will not be able to wear it until they have completed the new quest.
Both capes can be bought at a Marble Cape Rack (or Magical Cape Rack) in the Costume Room of a Player-Owned House.
Max and Completionist Capes and Hoods will automatically be returned to your refund box (for free) if you lose them.
Max and Completionist Cape requirements and stats:When you have achieved at least 200M XP in all skills, you are able to combine your Completionist Cape with any Custom Whip, granting you the Whip's bonuses special effects and special attack. These capes are obviously untradeable. You cannot wear a custom whip and completionist cape of the same enchantment at the same time.Spoiler: show
Combining costs 300M coins and will result in the whip being destroyed (this can be done at a Marble Cape Rack).
You can undo this by returning the enchanted cape and sacrificing a normal Abyssal Whip, then you'll get the original (unenchanted) Completionist Cape and the custom whip back (however this can only be done at a Magical Cape Rack!)
In order to perform the special attack of the sacrificed whip, you need to use 'Operate' on your enchanted cape (which will also drain your special energy bar).
The special attack cannot be used on players in the wilderness.
Overview of bonuses of enchanted Completionist Capes:Spoiler: show
