Sonic Wave is a line skillshot that deals physical damage to the first enemy it hits, marking and revealing them for 3 seconds. For the next three seconds, Lee Sin can activate Resonating Strike to dash to the marked target if it didn't get far away, dealing physical damage plus 10% of the target's missing health once it reaches the target.
There is a very brief (0.1s) channel time upon cast before Sonic Wave activates. Resonating Strike will immediately activate upon cast.
Sonic Wave will be completely blocked by spell shields and prevent follow up with Resonating Strike. If Sonic Wave marks a target and it then activates a spell shield, Resonating Strike effects will be blocked.
It is not blocked in any way by Black Shield.
Benefits from 100% of Lee Sin's spell vamp.
Each attack can proc the 35% slow for 1.5 seconds from Rylai's Crystal Scepter.
Sonic Wave can hit stealthed champions, revealing them for 3 seconds if hit.
Does not proc on-hit effects.

After Lee Sin uses an ability, for 3 seconds, his next 2 basic attacks gain 50% attack speed and return 15 energy each.

Lee Sin projects a discordant wave of sound to reveal his enemies for 3 seconds, dealing physical damage to the first enemy it encounters. If Sonic Wave hits, Lee Sin can cast Resonating Strike for the next 3 seconds.
Cost: 50 energy
Range: 975
Cooldown: 10 / 9 / 8 / 7 / 6 seconds
Physical Damage: 50 / 80 / 110 / 140 / 170 (+1.0 per bonus attack damage)

Lee Sin dashes to the enemy hit by Sonic Wave, dealing flat damage plus 10% of their missing health as physical damage.
Cost: 30 energy
Range:
Physical Damage: 50 / 80 / 110 / 140 / 170 (+1.0 per bonus attack damage)

Lee Sin rushes towards a target ally, shielding them both from damage for the next 5 seconds. After using Safeguard, Lee Sin can cast Iron Will for the next 3 seconds.
Cost: 50 energy
Cooldown: 8 seconds
Range: 750
Shield Strength: 40 / 80 / 120 / 160 / 200 (+0.8 per ability power)

Lee Sin's intense training allows him to thrive in battle. For 5 seconds, Lee Sin gains lifesteal, spell vamp, and armor.
Cost: 30 energy
Spell Vamp & Lifesteal Bonus: 5 / 10 / 15 / 20 / 25 %
Armor Bonus: 10 / 15 / 20 / 25 / 30.

Lee Sin smashes the ground sending out a shockwave that deals magic damage and reveals enemy units hit for 4 seconds. If Tempest hits an enemy, Lee Sin can cast Cripple for the next 3 seconds.
Cost: 50 energy
Cooldown: 10 seconds
Radius of AoE: 450
Magic Damage: 60 / 95 / 130 / 165 / 200 (+1.0 per bonus attack damage)

Lee Sin cripples nearby enemies revealed by Tempest, reducing their movement and attack speed for 4 seconds. Movement and attack speed recover gradually over the duration.
Cost: 30 energy
Radius of AoE:
Slow: 30 / 37.5 / 45 / 52.5 / 60 %

Lee Sin performs a powerful roundhouse kick launching his target back, dealing physical damage to the target and any enemies they collide with. Enemies the target collides with are knocked into the air for a short duration.
No cost
Range: 375
Knockback distance: 1,200 (estimate).
Cooldown: 90 / 75 / 60 seconds
Physical Damage: 200 / 400 / 600 (+2.0 per bonus attack damage)

The game will not end untill i say so-because i am lee sin the blind monk!
Enemy team wants to surrender but not if dont say so-because i am lee sin the blind monk!
I start at level 18-because i am lee sin the blind monk!
I have infinity stats-because i am lee sin the blind monk!
I kill all admins that have tried to bann me-because i am lee sin the blind monk!

Lee wasn't equiped with one of those seeing eye dogs.. So dont forget to help out with wards.
If you think you can play without then your wasting your time.
You will end up getting ganked and probably start getting pissed at your teamates.
Not good! Most late games the winning team has your jungle warded up to the point you cant leave base without an *** kicking.

Jungle Fights- Fighting team fights in the jungle is wonders for Lee Sin. Having the capability to take an opponent out of the fight can help alot, especially if its the tank. Lee Sin also has the mobility to chase out of the jungle and then quickly get back into the fight with his Sonic Wave. If you able to fight in the jungle do it. If the opponent does not get kicked over the wall they seem to get a short duration stun.

Iron Will - I always stick around in a lane if i have only about 200 health. Your iron will has a very short cooldown, and it gives you natural life steal. Try sticking around and get your HP back up quickly with it.

Dragon's Rage/ Sonic Wave duo - When performing Dragon's Rage, right before using it use your Sonic Wave on the opponent. This allows you too succesfully kick the opponent back, and then hitting your sonic wave a second time will allow you to jump right back on them.

Skill usageEdit
Unless it ensures a kill, try not to use your abilities to burst. Lee Sin gains a lot of DPS using abilities only after consuming each Flurry buff. Try to build your gameplay around this.
His abilities can exhaust his energy very fast limiting his burst capabilities, because of this he is better suited toward a hit and run style of game play, getting his opponent low enough for him to finish them off.
Early game especially, one of the most efficient methods of poking with Lee Sin is to use Resonating Strike to attack an enemy and then immediately retreat with Safeguard.
Resonating strike is a great chasing tool, allowing you to instantly get into melee range of enemies, when slowed, even through walls. It can also be used to chase enemies through slowing AOEs like Trundle's Pillar of Filth.
Sonic Wave and Resonating Strike is very useful for hit and run attacks. Attack an enemy, hit them with Sonic Wave, retreat, then use Resonating Strike to instantly rengage.
Be careful when using Resonating Strike. Smart enemies will run back to safety after seeing that they were hit with Sonic Wave. You may end up charging right into a turret or a 5v1 situation if you're not careful.
If you are jungling, always remember to use Iron Will before using Smite and/or Sonic Wave, as it grants you Spell Vamp, so you can get additional heal.
Try to land a Sonic Wave on enemies that can escape easily. Once they've used their escape skill, catch up to them with Resonating Strike.
The same method you use to catch up to enemies can be used to escape with Safeguard. An example would be fleeing an enemy pursuer to a large wall and having an ally like Ezreal use Arcane Shift and then follow him over with Safeguard for an easy escape or even placing a ward over the wall to jump to.
You can use Resonating Strike to catch up to enemies that you've knocked back with Dragon's Rage.
If the enemy you are poking is under a tower, make sure that Lee Sin has the energy to use Safeguard, be very cautious if the enemy can interrupt you from casting Safeguard immediately, and check beforehand to ensure you have a target on on which to use Safeguard for your escape.
Lee Sin's Safeguard is similar to Katarina's Shunpo so use it to make catching up or escaping from enemies less difficult. After casting Safeguard, he can use Iron Will to grant him life steal, spell vamp, and armor.
Tempest is very useful when facing stealth because it will reveal nearby champions and allows you to activate Cripple so that they can't get away.
Tempest can also be used to reveal other hidden objects such as Teemo's Noxious Trap or Shaco's Jack In The Box.
Using Dragon's Rage on the enemy tank at the beginning of a teamfight can disrupt the enemy team's positioning. Not only will Dragon's Rage knock the tank back, but it will also knock up the champions hiding behind him.
Similarly, you can use Resonating Strike to get to the back lines and Dragon's Rage their carry to your team, temporarily disabling their tank if he gets hit by his own carry. Follow it up with a Safeguard to get back to your team.
Using Safeguard on your minions allow them to take 1 additional tower hit, siege minions can take 2 additional hits.
When fighting against another AD fighter, try to rush Iron Will, as it gives you additional Armor and Life Steal.
For the best results jungling, Safeguard and Tempest should take approximately equivalent priority until Sonic Wave is needed to approach enemies in ganks
Build usageEdit
Due to scaling well with attack damage, but requiring a fair amount of survivability due to how close he must get to enemies while he fights, getting items like Wriggle's Lantern and Hexdrinker early can have noticeable results.
If played in lane, Atma's Impaler will be more beneficial than Wriggle's Lantern, especially if building more towards the tanky side of tanky DPS.
Randuin's Omen is a viable item for Lee Sin, complementing his ability to slow movement and attack speed.
Trinity Force is a fantastic item for Lee Sin. As he has 7 skills, he can constantly proc the effects of Sheen. Coupled with his passive, he is very likely to proc the Phage effect giving him excellent DPS and chasing.
Lee Sin can drop a tower fast if he has Trinity Force because his low CD abilities do not require targets to cast, letting him proc the bonus damage every 2 seconds.
With Youmuu's Ghostblade a midgame Lee Sin can singlehandedly push a turret. Stagger your abilities to trigger Flurry while activating the Youmuu's Ghostblade active.
Since Lee Sin does not use mana and scales well with attack damage, it can often be better to build the much cheaper Hexdrinker rather than the more expensive, but more popular Banshee's Veil.

+++Greater mark of Desolation to increase all of your damage
+++Greater glyph of Resilience for extra armor
+++Greater seal of Shielding for extra magic resist (I go with per level instead of flat because most of the time you don't need to worry much about magic resist till the point where the per level ones will be about even or even above the flat ones.)
Greater Quintessence of Fortitude x3 for extra health

Take as much of these runes you can!

+great damage
+great movement
+high healt level
+strong abilitys
+good in teamwork
+good killsteal
-hard to lurn
-hard to play
-not strong with no items
-hard to build items
-low healt