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