In this guide I will show you my way how I play Master Yi when he is traveling in the jungle.
Master Yi's potential in the jungle and while ganking is very high.
Although Master Yi is really squishy he can deal tons of damage and still survive the teamfights. Master Yi is because of his abilities the perfect champion to eliminate important opponents.

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Because I couldn't find an official Champion Spotlight of Master Yi, here are some videos and songs with and about the Master of Wuju:

PlentaKill feat. Badministrator - Wish (B.O.B. - Airplanes LoL Parody)

Play Video

League Of Legends - Master Yi Kill Compilation by TheLoLSoul

Play Video

LoL Emotes - Master Yi

Play Video

Attention: The shown videos were not made by me. Moreover, is not even used my Itembuild

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If you like to see some videos with an other good jungle champion then watch this video: Play Video I ask for your understanding if you find a few spelling mistakes. Because English is not my mother language is this may happen, but I will try to correct all the mistakes.

The saga of the Master Yi

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_____ 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's 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

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Offense

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_____ Summoner's Wrath for the improved Exhaust. _____ Brute Force for extra AD. Put only one point into it, because you'll get some AD through Wuju style. This point is just to get the necessary four points. _____ Butcher ensures for more damage to monsters _____ Alacrity gives you more attackspeed. And with more attack speed you can quickly clean the camps. _____ Deadliness also grants you more attack damage. _____ Weapon Expertise . More armor penetration = more damage. _____ Havoc increases your total damage. _____ Lethality increases your critical strike damage which strengthened the passive of Infinity edge. _____ Vampirism increases your chances in the jungle. _____ Executioner increases the damage to to enemies below 40% health. As Master Yi you primarily kill squishy opponents.

Defense

Summoner's Resolve for the improved smite. _____ Resistance for more magic resistance. But just place two points here. _____ Hardiness for more armor. _____ Tough Skin in order to get less damage from monsters. _____ Bladed Armor provides faster cleaning of the camps

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Both builds use the same masteries.

Start with your E-skill because the extra AD better fits to the lifesteal of Vampiric Scepter. Skill alternately "e" and "q" and in lvl 6, 11 and 16 you lvl up your Highlander. I skill Meditate only from lvl 13 because I think that this skill is not that useful for "jungle Yi". But if you disagree you can maximise this skill earlier.

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_____ Double Strike is a passive ability that empowers every 7th autoattack to strike twice.

• While jungling try to activate Wuju Style in front of the seventh attack. Thus this attack will deal more damage.
  
  
• If your Double Strike is available and the monster you are attacking is nearly dead then change your target and do this strike to a monster with more HP.
  
  
• Double Strike's counter increases while attacking turrets and other structures.
  
  
• Double Strike's second hit cannot crit, but it can proc on-hit effects.
  
  
• Master Yi's Double Strike is similar to Caitlyn's Headshot. It is very useful when farming minions. Gathering stacks on it by attacking minions, then attacking the enemy on the seventh strike is an effective harrassment method.
  

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_____ Alpha Strike is a targeted ability that strikes up to 4 enemy units, dealing magic damage. Master Yi is untargetable for the duration, and appears at the initial target's location when the spell ends.

• Alpha Strike's multiple-target component has a deceptively long range. You can target minions near an enemy champion to harass them.
  
• If Master Yi's target dies before the animation finishes he will be placed back where he originally cast the spell after the animation finishes and no damage will be dealt (as its damage is dealt once the animation finishes)
  
  
• Because at the end of the spell you're at the point where your first target is you can also use it to chase an opponent.
  
  
• Master Yi can be hit with spells that were already in travel before Alpha Strike is used.
  
  
• Master Yi can jungle with Alpha Strike giving him a chance to hit extra damage to neutral creeps.
  
  
• Alpha Strike can be used to avoid non-targeted abilities (e.g. Karthus's Requiem)

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_____ Meditate is a channeled ability that restores health each second it's channeled and increases Master Yis magic resistance and armor for the duration.

• Activate Meditate to get enough armor/magic resistance or/and health to survive abilities like Ace in the Hole by Caitlyn or Requiem by Karthus.
  
  
• When you are being chased, hiding in a brush and channeling Meditate can give you the upper hand against the enemies. However, do not do this if they can still defeat you after the Meditate.

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_____ Wuju Style passively increase Master Yi's attack damage, when activated the damage bonus is doubled. The passive effect is lost while the ability is on cooldown.

• When Highlander refreshes Wuju Style, its passive attack damage will stack with its active, thus giving 45 / 60 / 75 / 90 / 105 attack damage.
  
• Activating Wuju Style a second time, after the cooldown has been refreshed by Highlander, actually results in a decrease in damage, as it eliminates the passive-active stack.

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_____ Highlander is a self targeted ability that increases Master Yi's movement speed and attack speed and makes him immune to slowing effects for the duration. If he kills a champion while Highlander is in effect, all of Master Yi's cooldowns are refreshed, while assists will reduce the cooldowns by half.

Tips and tricks:

The steps to the right itembuild:

Masterly Build

Recommended build 1 sequence:
This is my normal itembuild. Mercury's Treads and Quicksilver Shash give you enough magic resistance. Moreover, the passive of Quicksilver sash is a must have for Yi. Frozen mallet because Master Yi is very squishy and Wriggle's Lantern gives you enough lifesteal and armor. Infinity edge and Phantom dancer ensure the proper attack speed and enough attack damage. Of course, a large part of the damage comes from the critical hits. In addition, you also get more AD by Wuju Style.

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A tanky masterly build

Recommended build 2 sequence:

With this items you're going to be more tanky. Wriggle's lantern and Atma's Impaler provide the necessary armor, Mercury's treads and Banshee's veil for the magic resistance. In this build I replace Quicksilver sash by Banshee's Veil because the passive are almost identical. Atma's Impaler provides not only the armor but also the critical hits and the attack damage. The guardian angel at the end makes for a good overall package.

Vampiric Scepter The Lifesteal gives you more staying power in the jungle. Cloth Armor If you don't jungle often or you feel not so safe then start with a cloth armor and 5x Health Potions.

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Boots of Speed With some champions you can start with this and 3x Health Potions. But in my eyes Yi is too mushy to begin with this item. Long sword Instead of starting with a cloth armor you can start with a long sword and 1x Health Potion. Due to the lack of lifesteal and lower armor you will more often return to your base.

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The starting items match with both builds.

Masterly Build

Wriggle's Lantern You will need this in every game because armor, and lifesteal and the passive of Madred's Razors will always be useful. Mercury's Treads Tenacity is a must for Master Yi because this is an item against one of his weaknesses. And the magic resistance is of the same importance.

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Phage Life against his existence as squishy and attack damage for more damage ;) . The passive gives you better chances when chasing. Zeal hmm, well why do I buy this item? Exactly, because of the extra speed, the extra attack speed and crit chance.

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Tanky Masterly Build

Wriggle's Lantern You will need this in every game because armor, and lifesteal and the passive of Madred's Razors will always be useful. Mercury's Treads Tenacity is a must for Master Yi because this is an item against one of his weaknesses. And the magic resistance is of the same importance.

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Atma's Impaler This is your item that gives you attack damage and armor. The armor is important for a tanky Yi and even as a tanky DPS you're going to need AD. Warmog's Armor In order to get attack damage by Atma's Impaler you'll need health. A Frozen Mallet is of course best.

Mercury's Treads Like I said in the "core build" part, tenacity is a must with this champion because it give you a huge amount of survivability. Wriggle's Lantern The Lantern is an awesome overall package and a must for a jungling Master Yi. This package contains everything you need. And the ward saves your buffs or the dragon respectively the baron/nashor.

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Frozen Mallet You might now ask why I prefer this item. I prefer it because it slows the opponent, which makes chasing easier, the extra health also gives you a higher chance to survive in team fights. Phantom Dancer I prefer Phantom Dancer and not infinity edge because I am much faster with the extra speed. I also have almost the same damage as with the infinity edge, because I'm attacking faster in the same time. But Infinity edge is still a very important item.

Youmuu's Ghostblade It's one of Yi's recommended items, so why shouldn't it be good? It is a good item, I use it if I think that I could need some CDR or some armor penetration. The ability of this item fits very well with Yi's ultimate skill. Last Whisper Its a nice item if your opponents stack armor. In addition, the critical hit will hurt even more. But use this item only if your opponents stack armor.

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Guardian Angel This item you should you buy if you die quite often. In addition, this item gives you more armor and magic resistance. Berserker's Greaves If you believe that you still have to attack faster, then these are just the right shoes. But you will lose a lot of survivability.

7./6. Gank

Initiate the fight in which you use Alpha Strike at your tartget, then activate "Wuju Style", use "exhaust" to slow your opponent.

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Baron Nashor
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Health: 8852 + 125 every 1 min
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Gold: 300
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Experience: 900
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Buff: Exalted with Baron Nashor
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Initial spawn time: 15:00
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Respawn time: 7:00
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Dragon
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Health: 3030 + 220 * (highest champion level)
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Gold: 190 (+25)
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Experience: 400
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Buff: -
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Initial spawn time: 2:30
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Respawn time: 6:00
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Ancient golem
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Health: 1372 (+90 per minute after spawn)
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Gold: 72 (+0.332 per minute after spawn)
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Experience: 231 (+2.5 per minute after spawn)
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Buff: Crest of the Ancient Golem
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Initial spawn time: 1:45
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Respawn time: 5:00
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Lizard Elder
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Health: 1372 (+90 per minute after spawn)
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Gold: 72 (+0.342 per minute)
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Experience: 210 (+2.5 per minute)
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Buff: Blessing of the Lizard Elder
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Initial spawn time: 1:45
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Respawn time: 5:00
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Wraith camp
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Health: 400
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Gold: 35
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Experience: 120
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Buff: -
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Initial spawn time: 1:40
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Respawn time: 0:50/1:15
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Wolf camp
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Health: 360
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Gold: 25
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Experience: 128
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Buff: -
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Initial spawn time: 1:40
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Respawn time: 0:50/1:15
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Double golem
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Health: 950 (large), 450 (small)
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Gold: 30
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Experience: 140
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Buff: -
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Initial spawn time: 1:40
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Respawn time: 0:50/1:15
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In teamfights I think that Master Yi has the same role as Fiddlesticks. You don't attack from the front, but rather from the side. After your team started to fight you join them and try to kill their AD-Carry ( Caitlyn, Ashe,...). But often you get focussed. In this case you should try to run away. I show below here in which order you should activate Yi's skills:

----> ---> --->autoattacks till they are dead.

This is my guide for Master Yi. I played him quite often to test some other builds and items. Although Yi is very often underestimated you will notice that this is absolutely no reason. If he's played correctly, he may very well help to victory. So have fun while plying the Bladesman.
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• add some videos in the jungle route section
• add a map which shows where you should/could place wards
• add a camp respawn part