The basic idea behind this build is huge damage quickly in mid to late game.

Items:


This item allows you to stay in the lane that little bit longer due to the health returns. Combined with you can heal at range too.


Simple enough: allows you to catch and escape enemies and get back to your lane faster.


Gives a nice damage boost and prepares for later on when come into play.


Increased movement and attack speed: both play a big part in this build, the faster you hit, the more you crit and the more damage you pump out.


The crux of the build, huge attack speed bonus increased crit chance and movement boost, enough said.


This increases your dps yet further and allows you to take on those pesky armor stacking tanks such as Malphite. This is a big buff for too.


Yet another, at this point you'll be looking at a +90% crit chance, around 2 hits a second and about 500 movement speed.


This is just to top it all off. You'll enjoy an extra kick to your damage, a nice health return on your auto-attack and , a heal and damage increase on , your will heal you for an extra 75 health and finally your given an extra ranged attack and slow! What more could you want?