Hi My summoner name is coffeecashew805 and I main I play on EUW. This is my first guide ever. English isn't my native language, so you should expect some grammar mistakes. Lee Sin is a mobile champion with high early game expectations. Lee Sin is IMO the hardest champion to play in league of legends.

Pros:

+One of the strongest early game champions
+High damage early game
+The champion with the most mobility in the game
+Great at ganking
+Great engage and disengage
+Style Points
+Farms well with Ravenous Hydra
+Good early clear




Cons:

-Falls off late game
-Hard to play
-Even harder to master
-Hard to balance his energy
-He is blind

Flurry
INNATE: After using an ability, Lee Sin's next 2 basic attacks within 3 seconds gain 40% bonus attack speed, returning 20 energy on the first attack and 10 energy on the second.

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Q:
Sonic Wave
ACTIVE: Lee Sin fires a sonic blast in the target direction, dealing physical damage to the first enemy it hits and granting True Sight icon true sight of them for 3 seconds.
PHYSICAL DAMAGE: 50 / 80 / 110 / 140 / 170 (+ 90% bonus AD)
If Sonic Wave hits, Lee Sin can cast Resonating Strike Resonating Strike within the next 3 seconds.

Resonating Strike
ACTIVE: Lee Sin dashes to the enemy marked by Sonic Wave, dealing physical damage, capped against non-champions.
「 PHYSICAL DAMAGE: 50 / 80 / 110 / 140 / 170 (+ 90% bonus AD) (+ 8% of target's missing health)

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W:
Safeguard
ACTIVE: Lee Sin dashes to the target ally or friendly ward. If the ally is a champion, both they and Lee Sin are shielded for 2 seconds and Safeguard's cooldown is reduced to 50%. Lee Sin can self-cast Safeguard to shield himself.
SHIELD: 40 / 100 / 160 / 220 / 280 (+ 80% AP)
If Safeguard is used, Lee Sin can cast Iron Will within 3 seconds.

Iron Will
ACTIVE: For 4 seconds, Lee Sin gains bonus life steal and bonus spell vamp.
BONUS SUSTAIN: 10 / 15 / 20 / 25 / 30%

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E:
Tempest
ACTIVE: Lee Sin smashes the ground, dealing magic damage to nearby enemies and granting True Sight icon true sight of them for 4 seconds.
MAGIC DAMAGE: 60 / 95 / 130 / 165 / 200 (+ 100% bonus AD)
If Tempest hits an enemy, Lee Sin can cast Cripple within the next 3 seconds.

Cripple
ACTIVE: Lee Sin slows all enemies in range and marked by Tempest for 4 seconds, decaying over the duration.
SLOW: 20 / 30 / 40 / 50 / 60%

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R:
Dragon's Rage
ACTIVE: Lee Sin roundhouse kicks the target enemy champion, instantly Root icon rooting them for 0.25 seconds, dealing physical damage and Airborne icon knocking them back over 1 second. Enemies hit by the enemy-turned-projectile take bonus physical damage based on the kicked targets bonus health and are Airborne icon knocked up for 1 second.
「 PHYSICAL DAMAGE: 200 / 400 / 600 (+ 200% bonus AD) 」

Play Video

You basically want as much cooldown reduction as possible. Go thunderlords for damage. You can also go courage of the colossus instead of thunderlords if you prefer tank lee.
Remove Thunderlord's Decree and Intelligence , add Legendary Guardian and Courage of the Colossus

Red -> Wolves -> Gromp -> Scuttle Crab (Situational) -> Gank

Lee sin is an early game champion, you want to do as much as possible in the early game.
The thing with this route is that you usually have full hp after taking the three route camps. If you are low hp after the route, then the reason is probably your low usage of his W. Safeguard and Iron Will

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I usually gank after doing my route. But I keep farming if there isn't any lane to gank. I usually gank mid or top at lvl 3. I usually start camping bot as soon as I get my Dragon's Rage.

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Because of the experience buff for the krugs, the jungle route has changed for almost every champion in the jungle. You will get lvl 2 from red buff as normal. After taking krugs, you will be lvl 3, after only 2 camps taken in total.
Red buff (lvl 2) -> Krugs (lvl 3) -> Gank or counter jungle.
You will be lvl 3 at 2 mintutes. This can lead to an early lvl 3 gank against a lvl 2 top or mid laner, which will mostly burn an enemy flash or maybe even get a kill for your team.
If the enemy jungler starts at his blue buff, then you can have a lvl advantage for an invade that can get you ahead of the enemy jungler.
I got this idea from Phylol. Show him some support!

You wan't to have deep wards against the enemy jungler. You should have wards on Dragon, Rift Herald and Baron Nashor. You should also have wards in river. This helps you to keep track of the enemy team. It is important to keep track of your enemy. If the enemy jungler is top side, then you can take dragon. Warding is one of the most important things to do in League of Legends.

Shout out to Heizman for letting me use his video!
Play Video

So a lot of Lee players make a big mistake in the late game. They got fed early, so they decided to go full ad. Full ad lee sin is useless in the late game. You can't one shot the enemy carry anymore because they have a lot of life steal, has guardian angel, is tanky or can kite very well.

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But how do you play Lee in late game?
I usually switch to full tank. Sell warrior and hydra to buy tank items. Buy cinderhulk. Get tank items.
You usually wan't to look for picks, objectives, baron and dragons.

You usually wan't to kick the enemy carry into your team. Mostly the enemy adc or midlaner.

Let's say that the enemy team has a darius with full build. You decide to kick him into your team, he ends up healing from his q, then he one shot's your adc. You just lost your team the fight. NEVER kick the enemy tank into your team as an engage. You want to kick the enemy carry.

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Or you can try getting a 2-5 man kick. When you kick an enemy into another enemy, it knocks them up and does the same amout of damage. So this combo alone can easily win a teamfight.
q onto an enemy minion or champion -> q -> ward to the side -> r an enemy champion into his own team (multiple champion knockup), you can also r+flash to get into a better position and kick the enemy in another direction. Watch the combo videos by Heizman to get a good explanation on how to execute a combo correctly. Like Dragon's Rage + Flash

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For teamfighting, it is important to note that trying to hard engage the enemies carry is not always a good route. If their team has hard cc, you die before you can do anything. If their teams carry is slippery, they could turn your good engage into a free kill on you. Sometimes the best route is to use your R as a peel for your carry or look to kick a front line tank into the backline carries as your R deals bonus damage to everyone knocked up based on a percentage of the kicked champions bonus HP.
NOTE: This paragraph was written by parrotbrah
Play Video

+A good Lee Sin knows that you don't have to land the q on the carry to kick them out of a teamfight.
+A good Lee Sin knows how to balance his usage of energy.
+A good Lee Sin knows when and how to engage.
+A good Lee Sin knows how to play against the enemy jungler.

-A bad Lee Sin always uses his Resonating Strike when hitting a Sonic Wave.
-A bad Lee Sin thinks that they don't need their team, a lot of Lee Sin players engage for a fight while the team isn't there with him.


Not so sick Lee Sin play


Sick Lee Sin Play

I will try to update my guide as much as possible. If you have any questions, then leave a comment. I will answer as many questions as I can.
Tell me if you wan't me to add a specific champion for matchups.

Thank you for reading my guide.