Hello! Corki is one of my favorite ad champions. Corki is such a fun champ having high poke damage and burst. In this build I will go over:

1. How to play corki
   
2. Skill Sequence
   
3. Runes
   
4. Item Purchase
   
5. Summoner Spells
   
6. Pros/Cons

Please Leave Tips and Comments :)

Corki is an very interesting ad carry. I play him as a bot ad carry champ. Based on poking with he AOE skills and massive amount of burst. With his massive amount of burst, Corki can be played as an great ad mid.
I play him as a Sheen Carry. With the massive amount of missiles he is able to input with Missile Barrage into the battle makes him a great Sheen Carry. As a Sheen Carry I put a lot of ad and attack speed.
Even if you miss some of your abilities the Sheen Passive still works which is great.

How about ap Corki?
Worst idea ever. Why?

1. Bad Ap ratios
   
2. 3 abilities based of ap with one that doesn't to any damage
   
3. Main damage source can be blocked by minons and can't rely on anthing else
   
4. Leaves his true damage doing nothing
   
5. No slows or stuns to land abilities
   
6. Turns Gatling Gun useless

Passive

: Corki's auto-attacks deal 10% of attack damage, as additional true damage to minions, monsters, and champions.

Ability Description

: Corki blasts a target area, revealing it for 6 seconds and dealing magic damage to all enemies hit. Any champions hit will also be revealed for 6 seconds.
Cooldown: 8 seconds.
Range to Center of AoE: 600
Diameter of AoE: 500
Cost: 80 / 90 / 100 / 110 / 120 mana
Magic Damage: 80 / 130 / 180 / 230 / 280 (+0.5 per ability power)


: Corki surges to target location with a speed of 650, dropping bombs on its path that create a trail of fiery destruction for 2.5 seconds. Opponents take damage each half second they stay in the trail.
Cost: 100 mana
Range: 800
Cooldown: 26 / 23 / 20 / 17 / 14 seconds
Magic Damage Per Second: 60 / 90 / 120 / 150 / 180 (+0.4 per ability power)

Maximum Magic Damage: 150 / 225 / 300 / 375 / 450 (+1.0 per ability power)


: Corki's gatling gun begins firing at enemies in front of him automatically every second for 4 seconds, dealing physical damage and shredding the armor of enemies who are under continuous fire. Armor reduction stacks and lasts 2 seconds. Corki can keep attacking and using other abilities while Gatling Gun is in effect.
Cooldown: 16 seconds
Range: 600
Cost: 60 / 70 / 80 / 90 / 100 mana
Physical Damage Per Second: 20 / 32 / 44 / 56 / 68 (+0.4 per bonus attack damage)

Armor Reduction Per Second: 2 / 4 / 6 / 8 / 10

Maximum Physical Damage: 80 / 128 / 176 / 224 / 272 (+1.6 per bonus attack damage)

Maximum Armor Reduction: 8 / 16 / 24 / 32 / 40


: Corki fires a missile in a line that will explode and deal magic damage in an area upon colliding with the first enemy it hits.
Corki can only fire a missile if he has missiles stored, and can store up to 7 missiles. Corki stores one missile every 12 seconds, the time to respawn a missile is affected by cooldown reduction and does not progress while having maximum missiles. Every fourth missile fired will be marked as a Big One, dealing 50% more damage than normal missiles and the explosion has a broader radius. After dying, Corki will respawn with 4 missiles.
Cooldown: 1.2 seconds
Range: 1225
Diameter of AoE: Regular (150); Big ones (300)

It depends with who is bot lane. If you fighting against a tanky champs down in bot I get Gatling Gun first. Corki's Gatling Gun shreds armor and combined with his passive rips tanks.
Gatling Gun being maxed first is still good with squishy champions.
Gatling Gun size is able to make then have NEGATIVE armor.
To piss of tanks even more the Black Cleaver is an good option. 40(Gatling Gun)+65(Black Cleaver)= 105 total armor reduction.
Negative armor works by increasing your damage.
Armor Penetration and Reduction works like this:
1st % Reduction
2nd Flat Reduction
3rd % Penetration
4th Flat Penetration

Reduction WILL get people negative, but they would have to be quite low armour in the first place.
Penetration WILL NOT go below 0.
Black Cleaver is Flat Reduction and so is Gatling Gun.
Please remember that I wrong.
Please comment if I am. Thank You!

If not against tanky champs your Phosphorus Bomb is a more consistent in damage and great for poking. Only get l level for Valkyrie because Valkyrie is mostly used for engaging or getting away. Valkyrie doesn't have a large damage input is another reason why.

Runes will effect your game a lot. Runes may seem meager amounts but help greatly in early game play.

1. Having attack damage runes is self explanatory. Your an ad carry that needs ad runes and you all ready have enough armor penetration.
2. Having attack damage runes is self explanatory. Your an ad carry that needs ad runes and you all ready have enough armor penetration.
   
3. Being a ad carry you will most likely be going bot fighting another ad carry. So armor runes will help get kills and get away with them when you are focused.
   
4. greater glyph of replenishment Corki is a mana hungry champ when he plays as an aggressive harass champion. Sometimes mana manipulator just is not enough.
   Have runes will help you the whole game and leaving golem buff to your ap carry and supports.

Being an ad carry that is poking based with the ability to crush tanks I get:
Attack Damage, Attack Speed, Armor Reduction(Not Penetration), and sometimes critical strike.
Corki has 2 abilities that are based on Attack Damage.

Starting Items:
Great item for starting the game have Health, Attack Damage, and life steal
For extra speed for corki's small range with basic attack and Gatling Gun.
x3 Goes with Boots
Boots:
Great early game attack speed
Items To Rush:
Heavy Damage increase especially if your good at getting creeps
Makes your enemies have negative armor
Mid game item:
Has everything corki needs: Slow, Movement speed, Attack Speed, Extra health and mana, Critical Strike, Sheen passive, and some attack damage.
Build Finishers:
MORE insane damage
MORE insane damage with out the stacks, great passive for adc, and extra critical.
Huge increase of attack speed and critical strike
Optional Items:
Not last enough in team fights. Helps with armor and magic resists. GREAT passive as everybody knows
Targeted with slows and stuns too much.
Good against champions with grabs, long range stuns, and snares.
Like Blitzcrank, Darius, and Amumu.

No Brainer Choices:
Great choice for corki because: Almost all the time can't be ganked with Valkyrie, Enables to catch and kill running enemies, hardest part about Corki is positioning and I think and flash really goes with Valkyrie.
Help against other Attack Damage Carries. Slows enemy and reduces damage given.
Helps finish off running opponents, reduces healing, and true damage.
Goes great with the slow from phage and Gatling Gun.
Other Good Choices:
Instead of have Quicksilver Sash and using that item stop for more ad you could get cleanse. It is a good option when they have champs like Amumu Alistar Lulu Lux Veigar and many more champions that have high crowd control.
Not the best but viable for Corki when you dont have a support with heals such as Blitzcrank.

Pros

1. All Aoe abilities
   
2. Extra True Damage
   
3. Amazing ability range
   
4. Good mobility
   
5. Tank Killer
   
6. Able to make people go into NEGATIVE armor

Cons

1. No Crowd Control
   
2. Depends on items to do massive amount of damage
   
3. Very squishy
   
4. Hard to use for some people
   
5. If bad creep score or not fed Corki won't be as good as other adc

To Corki a good farming is NEEDED! Most of Corki's Damage I think is off of his skills and items. With no money do start his build he will do no damage.

Farm with Corki is hard because of his short auto attack range. Harassing the enemy and making them hide is great because you will get free farm. If possible ask the jungler if you can have Lizard Buff because when corki has no crowd control he loses many kills from flashes or ghost.

Thank you for reading my guide! I hope this gives you good tips how to play Corki
Please Comment and Vote if you think this is good.
If you disagree on my build please tell me why because your not the only one who wants to learn more how to play Corki.
I may update the build.
Thank you :)