https://www.gamespot.com/articles/fortnite-skull-trooper-challenges-and-skins-how-to/1100-6462417/

Alongside Fortnite's 6.02 update, developer Epic Games has dropped in a few new cosmetics to the game, and some accompanying challenges that will unlock a special Back Bling. The in-game shop now has the Skull Trooper (Male) and Skull Ranger (Female) skins. The former is 1500 V-Bucks, while the latter is 1200 V-Bucks. The Skull Trooper is a returning skin, except this time it can be customized to have a white or green. Those that already had the Skull Trooper skin can also pick a purple look. The Skull Ranger, meanwhile, is completely new.

On top of those to there's the Skull Sickle Harvesting Tool, which will set you back 1200 V-Bucks, and the Crypt Cruiser Epic Glider for 1200 V-Bucks. However, if you want that Ghost Portal Back Bling you'll have to do five challenges. In the tweet below you can see a character outfitted with all the new goodies. Notice that the new Back Bling emits ghostly apparitions of other skins, which is pretty cool.