Hi evry one, this is mi first Croki build.

feel free to change phage into black cleaver in midlle game or end but first try with phage its good surv

INTRO
Hextech Shrapnel Shells - Corki's basic attacks deal 10% additional true damage to minions, monsters, and champions.

For an attack damage(AD) build this passive is too good. For all intensive purposes it used to function as a pure 10% dps increase, but now it is completely unmitigated damage. Corki is awesome.
Phosphorus Bomb - Corki fires a flash bomb at a target location, blinding targets in and around the blast. This attack reveals stealthed units around the impact area as well.

Deals 80/130/180/230/280 (+0.5) damage to enemies in a target area. In addition, the blast reduces an enemy's chance to hit by 35% and reveals nearby stealthed units for 3 seconds.

Lets not forget about the 35% blind. While the damage is nice and the revealing of stealth units or brushed units is great, the blind allows you to go toe to toe with other heavy dpsers(Damage per Second) and come out on top.
Valkyrie - Corki surges to target location, dropping bombs that create a trail of destruction for opponents who remain in the fire.

Corki surges to target location dealing 60/90/120/150/180 (+0.4) damage per second to enemies in the fire left along his path.

Probably my favorite natural escape mechanic in the game. Not only is it quick and have a perfect range, but any champ who is chasing you will have to pay a price to take the most direct route. It also functions as a great dps ability against champs like Warwick who tend to forget what they are stepping in.
Gatling Gun - Corki's gatling gun fires multiple shots every half second dealing a quarter of his total damage, and shredding the armor of enemies who are under continuous fire.

Corki's gatling gun fires at all targets in front of him for 3/3.5/4/4.5/5 seconds, dealing a quarter of his total damage and shredding 1/2/3/4/5 armor with each shot. The armor reduction persists as long as the enemy is under continuous fire.

This is your game ending ability. It is so powerful that I feel absurd every time I play Corki. If you get a head start on the enemies and have a decent team to cover your back you can take pleasure in ending your enemies lives before they realize what happened.
Missile Barrage - Corki fires a missile towards his target location that will collide with the first enemy it hits, dealing damage to units around the target. Corki stores one missile every 10 seconds up to 7 missiles total. Every 4th missile will be a Big One.

Corki fires a missile towards his targeted location that will collide with the first enemy it hits. Each missile deals 125/200/275 (0.3 + 0.2) area magic damage.
aaaa aaaaaaaa aaaaaaaaaaaa aaaaaaa aaaaaaa aaaaaaaaaaaaaaaaaaaa
aaaaa aaaaaa aaaa aaaaaaaaaaa aaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaa
aaaaaa aaaaaaaaaaaaaaa aaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaa
aaaaaa aaaaaaaaaaa aaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaa
AAAAAAAaaaaaa aaa aaaaaaaaaaaa aaaaaaaa aaaaaaaaaa aaaaaaaaaa