Flurry (passive)
After Lee Sin uses an ability, his next 2 basic attacks gain Attack Speed and return Energy.

Sonic Wave: Lee Sin projects a discordant wave of sound to locate his enemies, dealing physical damage to the first enemy it encounters. If Sonic Wave hits, Lee Sin can cast Resonating Strike for the next 3 seconds.
Resonating Strike: Lee Sin dashes to the enemy hit by Sonic Wave, dealing physical damage based on the target's missing Health.

Sonic Wave: Lee Sin projects a discordant wave of sound to locate his enemies, dealing 55/80/105/130/155 (+100% bonus Attack Damage) physical damage to the first enemy it encounters, granting True Sight of the target. If Sonic Wave hits, Lee Sin can cast Resonating Strike for the next 3 seconds.
Resonating Strike: Lee Sin dashes to the enemy hit by Sonic Wave, dealing 55/80/105/130/155 (+100% bonus Attack Damage) to 110/160/210/260/310 (+200% bonus Attack Damage) physical damage based on the target's missing Health.

Safeguard: Lee Sin rushes to target ally, shielding himself from damage. If the ally is a champion, they are also shielded. After using Safeguard, Lee Sin can cast Iron Will for the next 3 seconds.
Iron Will: Lee Sin's intense training allows him to thrive in battle. For 4 seconds, Lee Sin gains Life Steal and Spell Vamp.

Safeguard: Lee Sin rushes to target ally. If the ally is a champion, Lee Sin shields the ally and himself for 55/110/165/220/275 (+80% Ability Power) damage for 2 seconds and Safeguard's cooldown is reduced by 50%. After using Safeguard, Lee Sin can cast Iron Will for the next 3 seconds.
Iron Will: Lee Sin gains 10/15/20/25/30% Life Steal and Spell Vamp for 4 seconds.

Tempest: Lee Sin smashes the ground, sending out a shockwave that deals magic damage and reveals enemy units hit. If Tempest hits an enemy, Lee Sin can cast cripple for the next 3 seconds.
Cripple: Lee Sin cripples nearby enemies damaged by Tempest, reducing their Movement Speed for 4 seconds. Movement Speed recovers gradually over the duration.

Tempest: Lee Sin smashes the ground, sending out a shockwave that deals 80/120/160/200/240 (+100% bonus Attack Damage) magic damage. If Tempest hits an enemy, Lee Sin can cast Cripple for the next 3 seconds.
Cripple: Lee Sin cripples nearby enemies struck by Tempest for 4 seconds, slowing their Movement Speed by 20/30/40/50/60%. Movement Speed recovers gradually over the duration.

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. This technique was taught to him by Jesse Perring, although Lee Sin does not kick players off the map.

Lee Sin performs a powerful roundhouse kick knocking an enemy champion back and dealing {{ damage }} physical damage.Enemies the target collides with are knocked into the air briefly and take physical damage equal to {{ damage }} plus {{ percenthpcarrythrough }}% of the initial target's bonus health.

Thank you, I hope you had a joy reading my guide. Rate fairly aswell.

Special Thanks to, League spy and na.lol for the data and info!