What is the rarest skin in fortnite?

Here's some information about what is commonly considered the rarest skin in Fortnite:

The skin most often cited as the rarest is the Black Knight. It was a Tier 70 reward from the Season 2 Battle Pass. Since Battle Passes are only available for a limited time, and many players didn't participate in Season 2, the Black Knight is extremely uncommon.

Other contenders for rare skins include:

• Renegade Raider: Available in the Season 1 Item Shop, it required players to reach level 20 and then purchase the skin.
• Aerial Assault Trooper: Also from the Season 1 Item Shop, it required reaching level 15 before purchase.

It is important to note that rarity is subjective and changes over time as new players join the game. Skins that were once common can become rare if they were only available for a short time and are no longer obtainable.