Not Updated For Current Season
This build is good for a killer who want to get kills. If you use ambush to come near the enemy and then use your to attack him or her they will take a lot of damage. If you wanna kill them you must slow them with debilitating poison and then use expunge to kill them because the stacks of your venom. So did I scored a pentakill and a lot of multiklls.
Dorans blade is useful in the early phase of the game because it give you health ,attack and life steal what can be the winning factor in a fight.
Health potion is useful because it let you longer stay in the lane. And if you stay longer in the lane you will get more experience.
After a kill and what minions kills later you can buy Berserker greaves.
Berserker greaves give you attack speed and off course movement speed. If you chose for Berserker greaves you need Phantondancer for the extra movenment speed. Otherwise you are to slow to finish someone.
If you want to gank a lot you must buy boots of mobility because the speed you get if you run out of combat.
Zeal is for the extra movement and attack speed. Zeal give also critical change so that is good for a champion with a high attack speed.
Madreds Bloodrazor helps you to kill tanks. And if you have a high attack speed (what you have now) you do a lot of damage.
Last Whisper give you attack speed and armor penetration, what you need in mid and late game.
Infinity edge helps you to do a lot more damage. And you need that.
Hextech blade is a good item :P damage lifesteal active:)/. And the ability power will help you finish a enemy because expunge will do more damage.
You don't need ghost because you can flee in the bush and use ambush to flee relax or attack again if your team mate's arrive.
Exhaust helps you to slow them because debilitating poison is sometimes not enough. Against melee this is realy helpfull to kill them or to escape.
Flash helps you to escape and to kill someone.
The early game is very important. Try to kill minions and don't die. Maybe you can kill someone with teamwork.
Mid game now you can sneak to squishy champions and kill them. Use w, r and e to kill them. (hotkeys)If you have the time kill the lizard for the buff. This will help you to kill the stronger champions. Also can this be very tactic in a team battle, because they can't escape..
Late game: Be careful and don't start a fight alone. It is wasting to die. Maybe ignoring team mates will call you a kill stealer but that doesn't matter. Place some wards if you want to fight alone.
If you want to flee use q and run through the bush. This can save you.
ambush, debilitating poison, ultimate and finsh them off with expunge.