Abilities of Master Yi
Spell skill priority is an important winning factor for Master Yi. Understanding the abilities of Master Yi in League of Legends is another. Below you can find all the relevant information on Master Yi abilities. In order for item builds you should check the build for Master Yi.
Passive: Double Strike
Every few consecutive basic attack, Master Yi strikes twice.
Alpha Strike
Master Yi teleports across the battlefield with blinding speed, dealing physical damage to multiple units in his path, while simultaneously becoming untargetable. Alpha Strike can critically strike and deals bonus physical damage to monsters. Basic attacks reduce Alpha Strike's cooldown.
Master Yi becomes Untargetable and teleports to rapidly strike enemies near his target, dealing totaldamage physical damage to all enemies hit after alphastrikebounces hits.
This Ability can strike the same enemy repeatedly if there are no other targets, dealing subsequenthitmultiplier*100% damage for subsequent hits (subesquentdamage), for a maximum single target total of singletotaldamage physical damage.
Meditate
Master Yi rejuvenates his body by focus of mind, restoring Health and taking reduced damage for a short time. In addition, Master Yi will gain stacks of Double Strike and pause the remaining duration on Wuju Style and Highlander for each second he channels.
Master Yi channels, restoring totalheal Health over healduration seconds. This healing is increased by up to maxmissinghealthpercent*100% based on Master Yi's missing Health.
While channeling and for drlinger seconds afterwards, he takes initialdr reduced damage, decreased to damagereduction*100% after the first initialextradrduration seconds.
Wuju Style
Grants bonus true damage on basic attacks.
Master Yi's Attacks deal an additional totaldamage true damage for duration seconds.
Highlander
Master Yi moves with unparalleled agility, temporarily increasing his Move Speed and Attack Speed as well as making him immune to all slowing effects. While active, Champion kills or assists extend Highlander's duration. Passively reduces cooldown for his other abilities on a kill or assist.
Passive: Champion takedowns reduce the remaining Cooldown of Master Yi's basic Abilities by rcooldownrefund*100%.
Active: Master Yi enters a trance, gaining rmsbonus% Move Speed, rasbonus% Attack Speed, and immunity to Slows for rduration seconds. Champion takedowns extend the duration of this Ability by rkillassistextension seconds.
FAQ on Master Yi
What do you max first on Master Yi?
Most Master Yi pros max out 
Alpha Strike first.