User blog comment:YourPrivateNightmare/The mystery of Blue Ezreal/@comment-5557556-20130613041952

There are several things that blue Ezreal is good.

First, his damage is centered around Mystic Shot. That is your bread and butter. Everything in his build is centered about maxing its raw power.

When you get all the items you have around 320 damage (depending on your runes and masteries). That translated into Mystic shot is 115+320+6=441 physical damage from only one spell.

This build also gets your cooldown reduction to 40% (with blue elixir) which gives you 2.4 cooldown on Mystic shot. If you hit someone with Mystic shot, its cooldown is 1.4 seconds meaning that you can deal 441 physical damage on single shot. Add Blade od the Ruined King and that rockets to 541 physical damage thanks to Mystic shot's ability to proc on hit effects (if enemy has 2000 current health).

Iceborn gauntlet is there to further boost that damage with 125% base damage or 101*25/100=25. So in the end it deals 125+541 from mystic shot =666 (deomnical damage). But it is not over yet, add Muramana to that formula which is (2600 mana) 3*2600/100=78*2=156.

So the final is this 125 from Iceborn Gauntlet + 441 from Mystic Shot damage + 100 damage from BOTRK + 156 from Muramana is = 822. So with full mana and enemy having 2000 current health he can deal 822 damage on a single Mystic shot hit that could be repeated again in 1.4 seconds.

Maybe I got some numbers wrong but I remmember hitting Soraka in a bot game for over 900 damage with a single Mystic Shot.

Every item in his build is there to amplify each other.

The only strange thing is that I've never seen Blue Ezreal live. I just heard of him and I heard the people complaining about him.