Disclaimer: I do not own Naruto Or League of Legends.
I am writing this challenge because it is an idea that I would love to see.
Naruto X League of Legends Crossover Challenge Rules:
Uzu was the league and all the Champions were the ruling body.
Kushina was Annie and the third decides to give Naruto Tibbers when Naruto is young not knowing what Tibbers is.
Naruto activates Tibbers during a mob attack causing the deaths of the mob.
The third has contact with some Uzu survivors and has them come train Naruto (preferably Brand or some other fire user)
Ahri is the Kyuubi and seeing Tibbers in Battle form breaks the genjutsu and causes her to decide to train Naruto.
Tibbers is mobile and can talk in his toy form and can change on his own.
Other then the rules it's up to the author what to do in the fic although I wouldn't say no to some Sauske and Sakura bashing but not Kakashi he's to cool to bash.