The 5 rarest League of Legends skins
For all the skins available to purchase in League of Legends, there exist a handful that aren't available to the public.
These skins, more commonly known as “Legacy Skins,” are some of the oldest in League of Legends. They were only given out during certain events or have been discontinued after their initial release.
If you see any player using these five skins in the game, then you are likely playing with true veterans that have played since Leagues initial closed beta period on April 10, 2009.
Silver Kayle was released with the original retail copy of League of Legends in 2009. As stores pretty much never restock the physical editions, so it's near impossible to find a copy that has the original codes. And even if you did, Riot disabled the codes back in 2014.
Rusty Blitzcrank was discontinued in January 2010 and was only available on the store for a mere three months before it was pulled. The skin looked too much like the original Blitzcrank skin and was pulled because of that very reason.
UFO Corki was gifted to players who created an account for the game before Jan. 14, 2010. It was given to players as part of a promotion for an award League of Legends won that year.
If you tested League of Legends when it was still in beta, this was your reward. King Rammus (a subtle hint to another character by the name of King Koopa) is a Super Mario series nod that lets players know you are a League of Legends veteran.
The PAX skins (Twisted Fate, Jax, Sivir)
PAX Prime 2009, 2010 and 2011 gifted event goers with these three legendary skins. The first skin of the trio, Twisted Fate, was given to a small pool of players attending the event to celebrate the game's release and is the rarest skin in the game.
Those who attended the PAX Prime conventions the following two years were given Jax and Sivir respectfully. These would be the last PAX Prime skins created and the series was discontinued from 2012 onwards.