Keeper of the ancient art of Wuju, Master Yi is a mystical warrior from the isle of Ionia. He descended from one of the few tribes dedicated to the preservation of Wuju, a martial art founded with the principles of absolute spiritual awareness of one's self and one's enemy. When the armies of Noxus invaded Ionia, Master Yi joined in the Ionian defense to fight the craven enemy, bringing his village honor through his unparalleled mastery of the blade. The ensuing battles ravaged the land, but no conflict inflicted as much horror as the day the armies of Noxus closed in on Yi's village. Left undefended, the village became the unfortunate test subject of the latest invention by an up-and-coming chemist, now known as Singed. The remains of the village that Master Yi returned to were so horrific that it remains a festering scar on Ionian history. To this day, no Ionian will ever publicly speak of what occurred.

After the Noxian invasion was contained, Master Yi fell into a deep isolation. For years, he trained morning to night, speaking to no one and refusing offers of consolation by fellow Ionians. The only thing stopping him from madly charging into Noxus battle lines headfirst was his pledge to keep the Wuju style alive. Even though he seethed with impatience, his rage became a tool for sharpening his practice of Wuju, developing stronger and deadlier skills for his eventual vengeance. The only thing that roused him was news of the League's formation, and Noxus' subsequent enrollment in the League. Master Yi now brings his mastery of the blade to the League of Legends with unflinching purpose: to avenge his kinfolk and end the predations of the Noxus once and for all.

"The art of Wuju lives on in Master Yi, and is plunged through the hearts of his foes." -- Soraka, the Starchild

Hi all!,This is my First Mobafire Build,Sorry if there's Wrong about my Guide,You Can Comment The wrong Things so I can Change it...Okayyy....Here's My Guide Hope you Enjoy...

Master Yi Is Very Squishy,So in Teamfights Master Yi Should Use His W Alpha Strike First And then Run,And Let your Team attack the enemy,After your Alpha Strike Cooldowns You Should Use Your Highlander Then use Alpha Strike,You can Get Penta Kill There If The enemy Team Has Low Life And Boom!!!! Penta KILL!!!

I Take Ignite And Flash Because, Ignite Finish Off Enemies and Flash Can use to Chase or Flee...
-Okay,Some People Will Say that Y use Flash for Chasing and Fleeing? Instead Of Highlander ? -Because Flash Can Go through Walls...

My Items are Doran's Ring,Ionian Boots of Lucidity,Guinsoo's Rageblade,Hextech Gunblade,Trinity Force,Zhonya's Hourglass....
Yeah My Items are Like From Jax The Grandmaster at arms...
Cuz I want Master Yi To be a Hybrid Like Jax Which is Op...
Doran's Ring Can Help You In Early Game,Which Power Ups Alpha Strike
Ionian Boots of Lucidity Which has Cooldown Reduction Thats Helps you to spam abilites
Guinsoo's Rageblade Which Inreases Your Attack Speed and Ability Power per hit Which Also Power Ups your Passive Double Strike
Hextech Gunblade Which has Lifesteal and Extra Ability Power...
Trinity Force For Extra Damage
Zhonya's Hourglass For Ability Power And The Whatever Skill XD

No Need To Explain Because it is just basic Runes

Pros:
-Can't be Slowed Because of Highlander
-Has Many Escape Skills
-Super Heal
Cons:
-Squishy early Game
-Hard To Master

Oh There's My Guide,Hope You like It....Adding more pictures and info Soon...And oh yeah Thanks to JhoiJhoi! Her epic guide can be found here!