User blog comment:YourPrivateNightmare/The mystery of Blue Ezreal/@comment-8709779-20130613155429

Ok so

the thing about blue ezreal is that it isn't just a build, its a playstyle

the purpose of the build is to become an AD caster rather than an autoattacker

with the build, you have extremely low cooldowns due to CDR + mystic shot

that, combined with the slow from     Frozen Prostata examination  allows you to kite indefinately, with no mana issues due to your insanely high mana pool. the synergy between   Mumumananana,    Frozen Prostata examination , and Mystic Shot   is really good, as you do damage based on mana on a single target spell with long range that creates a slow field and also lowers the cooldown of your other spells, which itself is on a low cooldown.

your ultimate is on an extremely low cooldown, and your puusyflash is is basically up whenever you need it.