Ezreal is a very versatile champion, he can be played as an AP mage, hybrid or AD carry. This build focuses on ez being played in my opinion the best choice which is AD.

Pros and cons of Ezreal.


Pros
Ezreal can be built ap ad or hybrid
Very strong at certain points of game
Amazing at harass
Amazing at kiting
DOUBlE FLASH
Can snipe people from across the map
Major $$$ from assists with ult
Amazing at team fights




Cons
Squishy
Underestimated by team
CC counters ezreal HARD
Somewhat farm/kill reliant
Focused alot in team fights

For runes I use ArP marks, mp5 seals, CDR glyphs and HP quints. ArP because this adds on to the damage of ezreal's basic attacks and Q. mp5 seals because Ezreal harasses/farms a lot with his Q.CDR glyphs, because shorter CD for ult q and flash.

For masteries I do 21/9/0 Most in the offensive tree and defensive tree for a little bit more of survivability.

I always start with a dorans blade for the hp and damage. This gives a nice boost to your Q and hp. I usually harass and farm with my Q and go back after I make as much gold as possible when I am low. On the first trip back you should get boots and a vamp scepter if your doing bad if your doing good then get a madreds so you can kill creeps in the jungle (if its okay with ur jungler) I always get wriggles because of the life steal and proc against minions. After wriggles I get either boots of swiftness for speed or merc treads if the team has too much cc. (Ezreal is really prone to CC) Sheen is a must after the boots because of the amazing damage it deals. It doubles your damage and the cool thing about it is if you miss with your Q you will still have the sheen buff so an auto attack will deal the same damage as your missed Q. Triforce is an amazing item on ezreal because of the speed buff attk speed slow and passive. All of these are INCREDIBLE on ezreal. After the triforce get Black cleaver this is really important because of the amount of armor it removes and how it adds to your overall DPS. Now your getting really late in the game you should start worrying about defense. Life steal obviously wont save you when rammus is charging in or you get focused in fight so now you have to get Banshees if you want to live more than a minute. After banshees its your choice more survivability GA more dmg infinity edge.

The skill sequence is pretty obvious for EZ always max Q first then E and essence flux last.

CC is ezreals worst enemy because if he's stunned or silenced or what ever he can't flash away from danger so please get merc treads if the enemy team has cc, because if your running away from rammus's powerball it's just inevitable death prolonged by your speed atleast if you have merc treads the slow/taunt will be shorter

Why flash? DOUBLE FLASH if you get ganked, DOUBLE FLASH, you chasing somebody fast? DOUBLE FLASH, about to die DOUBLE FLASH over the wall, it's an amazing combo on ez

Now why ignite? people seem to hate ignite, but it is perfect on ez when your fighting somebody and they happen to run away with 10 hp in the fog of war do you honestly think you can hit them with your ult and expect them not to know your firing it? Thats pretty unlikely ignite solves this problem for you. Ignite also does 410 true damage late game that's a lot.

Exhaust is another awesome summoner spell to use. It's a good slow and armor reduction, cc is good since ez doesn't have any

Ghost is okay to use with ez it's a nice speed buff to chase if your flash isn't enough

Any other summoner spell is just one I do not like to use.

If you want to farm with ezreal either last hit with auto attacks or your Q. His ult can also be used to clear massive minion waves from afar

Ezreal is very squishy but very powerful with an escape tool. First when a team fight starts shoot your ult when the enemy team is bunched up this gives your team a big advantage and you big $$$ from assists. Spam your Q over and over and auto attack their squishy targets DO NOT FLASH IN. If you get focused or damaged flash away and continue to kite with your Q.

Ezreal is a very powerful underplayed and often underestimated champion. He can go hybrid, ap, or ad and still be amazing. He has a flash and his Q reduces the cool downs of all his spells this is huge because the more he uses Q the more he can use his spells.