The Krampus skin is an Legendary Fortnite outfit. Krampus was available via the Item Shop for 2000 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Krampus Skin Details
Here comes anti-claus...
Fortnite Krampus Skin PNG Images
Here is the PNG images of Krampus below!