Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Many people Underrate Ezreal due to the latest nerfs on Ez, but he can still deal massive amount of damage, if played right.
Hello I'm Gerael and these both builds are for Twisted Treeline.
Item Purchases section says in what order you should buy items.
Choose AP or AD according to your teammates. If you have Trynd and Mundo on team, choose AP. If you have Rammus and Fiddle on your team, choose AD.
Maybe you are asking, why am I skilling Essence Flux as the last, because Arcane Shift is more important for TT, you need to move when you're playing Ez in TT.
Another thing in these builds are, that I don't have any defensive items for Ez, it's because you already have enough defense with attack speed reduction with essence flux, teleporting over walls with Arcane Shift and you have also Ghost and Flash.
AD Ez build:
If you do have problems against Sion, Rammus and other disablers go for Mercury's Treads, if not go for Boots of Swiftness.
main stats - AD, Lifesteal
Yellow runes for mana regeneration as you won't have any mana regen items and these runes with meditation are enough for Ez.
Red runes for armor penetration are for increased damage with your mystic shot.
Blue runes are for flat cooldown reduction as you will need to spam your abilities. And why flat? Because Arcane Shift and Mystic shot have long cooldown at low level.
Quintessences are flat HP for survivability.
Why should you get Sheen? It's simple: for mana and for both AP and AD increased damage. When you're exhausted your mystic shot works through it ,so increased damage with Sheen is very useful.
If you have a jungler on your team like WW or Udyr you can skip Wriggle's lantern and go right for Bloodthirster
AP Ez build
If you do have problems against Sion, Rammus and other disablers go for Mercury's Treads, if not go for Sorcerer's Shoes.
main stats - AP, Magic Penetration
Quintenssences and yellow runes are for same reasons as in AD.
Red runes and blue runes are for Ability Power.
Why shouldn't you get cooldown reduction and magic penetration?
Because you will gain enough magic penetration from masteries and items and ability power is more important than cooldown reduction, because more ability power means more damage with both of your ad (for increased damage with mystic shot + lichbane)and ap abilities.
So, AP means more than cooldown reduction.
I hope you like both of these builds and you're going to try them out. :) Anyway Ezreal is really hard to play champion, so all you need is patience with him.