Hello everyone :) This is my first guide with my favorite player Master Yi! I always get cool scores like 13/1/0 and so I believe I shall share my knowledge with you. Whoever doesn't like it don't troll please it's my first guide. This guide will give you the edge on team fights when rushing with Alpha Strike in a team fight and executing enemy champions with Highlander and Wuju Style or just rushing in landing some critical strikes and leaving fast with at least 500 Movement Speed!!!

ENJOY

Pros
-Good early game
-Very nice ulti
Cons
-Kinda squishy

Greater Mark of Desolution : I chose this because it is very necessary
Greater Glyph of Malice : Because he needs critical chance
Greater Seal of Alacrity : Nothing to say, it is mandatory :)
Greater Quintessence of Alacrity : For Attack Speed
Greater Quintessence of Desolation: For Armor Penetration

You could also get :
Greater Mark of Alacrity
Greater Seal of Alacrity
Greater Glyph of Alacrity
Greater Quintessence of Alacrity
I know it sounds stupid but Attack Speed is REALLY good in Master Yi

Summoner's Wrath : To "boost" Exhaust
Brute Force : For a small increase on Attack Damage
Alacrity : Gives small boost on Attack Speed
Weapon Expertise : For Armor Penetration
Deadliness : Also for Attack Damage
Lethality : For a bit more Critical Damage
Vampirism :For Lifesteal
Sunder : Armor Penetration
Executioner : It's really useful when you chase somebody with your Highlander
Resistance : For Magic Resist
Hardiness : Armor
Durability : Good Health
Veteran Scars : Gives you health

Flash : GREATEST SPELL ON MASTER YI :) It can really help you escape or chase somebody
Exhaust : Another great spell for chasing and ganking
Surge : Well sometimes I use Surge too for it's stat boosts (Here i used the word BOOST again :P)
Ignite : Pretty good too for chasing, easy kills and stopping heals.
Teleport : It is just good for getting in lane
Ghost : Awesome at chasing and escaping. Good alternative!
Heal : Also very good for saving yourself

DONT EVEN LOOK AT THESE SPELLS!!!
CLAIRVOYANCE : I dont see a reason about taking it
CLARITY : Kinda helpful but not needed
CLEANSE : Not really
GARRISON : Seriously if you want it get it.
REVIVE : Same as Garrison
RALLY : Good for teamfights but not necessary
FORTIFY : Same as Revive and Garrison
PROMOTE : Same as Fortify, Revive and Garrison :PPP

Dorans Blade : Starter item
Berserker Greaves : For boots and attack speed
Infinity Edge : The main damage item
Phantom Dancer : Good Critical and Movement Speed
The Bloodthirster : Good Damage and Lifesteal boost
Phantom Dancer : As mentioned above
Frozen Mallet : It gives the Health Master Yi needs for not being squishy and the slow effect is great!

This is the end of my guide I know it's SUPER MEGA POOR but it is because I never made one before so go easy on me.