I'm not good at writing gameplay guides, so please don't expect too much from this section. My main goal with this was to provide the build for others to try, but I will try to describe the gameplay as best I can.

Start the game with a tear and 2 potions, the reason being you have a good chance of maxing stacks of manamune early and if you can get the gold, it's not a bad idea to pick up manamune before your other items.

In lane, you're going to want to spam Q as much as possible. You want to stack your tear as fast as possible and you want to accumulate gold. The beginning of this build is rather slow, but it picks up fast.

Goal for first back is a Sheen and Boots. I don't go for Duskblade first because Duskblade is more expensive than essence reaver and on it's own doesn't benefit Ezreal too greatly, however, Essence Reaver will give your Q more burst making you more relevant early. Afterwards, your goal should be to finish your boots into Ionian and then get Duskblade. After that, Manamune into Serelyda's for the kite and additional armor penetration. Ravenous Hydra is the final item, as it gives everything this build needs. Damage, Ability Haste, and Omnivamp.