10. Riot Squad SingedRiot Squad Singed is a skin that was only available at real life Riot events such as Pax, this skin however will not be available at real life events anymore, making it the 10th rarest skin.9. UFO CorkiThe last time this skin was available was back in 2010. Riot promised to give away this skin to all players if they won 2 awards that year and they won 3. This skin has not been available since which makes it the 9th rarest skin in League of Legends.8. Silver KayleAvailable to players who purchased the retail collector's edition of League of Legends is Silver Kayle. This skin is so rare because not many people purchased the retail collector’s edition of a game that was in its early stages.7. Victorious JarvanVictorious Jarvan was given to players who made it to gold or higher in season one. If you see anybody with this skin, you have just run into a veteran.6. Triumphant RyzeThis skin is very hard to get but it is possible. In order to achieve this one you have to win an officially sanctioned event that Riot games has approved.5. Urf WarwickUrf Warwick was released in 2010 when Ultra Rapid Fire was released for the first time. This skin was made in honor of Urf the Manatee who fell prey to Warwick.4. King RammusThis skin was only awarded to beta testers, which makes it one of the rarest skins in the whole game.3. Rusty BlitzcrankRusty Blitzcrank was removed from the game not long after it was released because it was too plain to be a legacy skin – it was also too similar to the default. As a matter of fact, if you turn down your monitor brightness while using Blitzcrank’s default skin you are able to get something that looks pretty close to rusty.2. PAX Twisted FatePAX Twisted Fate was one of the few skins given away at PAX and is one of the most expensive skins in League of Legends. This skin has sold for around $1,000 on eBay but is very hard to find these days.1. Black AlistarBlack Alistar was awarded to any player who preordered the digital collector’s edition. This skin is the most rare skin in the game purely because not many people pre-order a free-to-play game.