Pros:
Awesome turret diver
Goes well with a stun
No Cost Skills
Easy Champ to Learn
Very Easy to Farm!

Cons:
CC interrupts ultimate
Team Oriented
Tends to be Focused

Also the Stats Above are Wrong! Link to the Right Stats ---> Katarina Right Stats Build!

Quintessences : HPor Magic Pen( I Prefer Hp Quit's just because katarina lacks early game )

Marks : Magic Pen( I cant think of any other type that would be anymore beneficial than Magic Pen )

Seals : Armor, Hp Regen( Both of these for more survivability ) , or Ability Power Per LvL
Glyphs]: Magic Resist(Also for survivability ) or Ability Power Per LvL

Early Game I Always start with a Dorans Shield. Why? Because Katarina isn't exactly the "First Blood Type" she only has one skill at LvL 1 that does almost nothing and also, it gives beast health and hp regen early game.

After Dorans Shield if I have to go back, I normally take boots of speed. Obviously For the Movement Speed so your not so slow.
However, If I am Fed the 3rd item I always get is Giants Belt. Katarina is Super Squishy and this gives you amazing health early game and this makes it a lot harder to kill you.
Once I have Giants belt depending if im fed or not, I typically build it into a Rylais Crystal Scepter, However if I am not fed, I usually just build Boots of Speed into Sorcerer Boots.

After I have Rylais and Sorcerer Boots I normally make a Hextech Revolver. This item gives Katarina a lot more survivability during her ultimate and the Laning Phase.

Following Hextech Revolver i strive for a Rabadon's DeathCape. This Gives Katarina some serious Damage into all of her Abilities.

If the game has lasted long enough, I try to make Hextech Revolver into a Hextech Gun. I Absolutely love the active on the Hextech Gun it is awesome for keeping people in your ultimate range.

Later on, once i have acquired the Following items. I attempt to make a Banshees Veil. Now, Sometimes I get this item a lot earlier in the game just because the enemy team has some Interrupting Skills during my ultimate. Otherwise, I try not to make it until later game for more survivability.

If again the game has Lasted this long, I seek out a Void Staff. This helps A lot with Ability Power and Magic Pen.

Ok some of you might be wondering "wheres!" Well Ill tell you. Getting Mejai's on Katarina can be rewarding but its still a snowball item.
To be any helpful at all its has to be at least 10+ stacks about 75%+ of the time. If you do end up wanting Mejai's. I would invest in one early as possible and not end up getting Void Staff. Otherwise you'll end up wasting money and item space.

Passive :Voracity - After a champion kill or assist, Katarina gains 25 gold and her cooldowns are reduced by 15 seconds.

A Beast Passive for Katarina. Once she gets any assist or kill, all her skills are refreshed ( expect for the ultimate, its reduced by 15 seconds ) This Also allows you to turret dive very effectively, because if they die quick enough you can immediately Shunpo out.

Q Ability :Bouncing Blade - Katarina throws a dagger that bounces from enemy to enemy, dealing magic damage.

Amazing harasser! At LvL 5 this Skill almost always makes its way to find the enemy if there even anywhere near minions during Laning phase.

W Ability :Passive: Katarina's attacks deal increased damage. Active: Katarina's next basic attack has a bonus effect. Bouncing Blade deals full damage to every target hit and reduces incoming healing to the target, or after using Shunpo Katarina takes reduced damage for 3 seconds.

Very useful Ability, Helps with survivability on Shunpo during ultimate and also, reduces healing by 50% which tributes a lot to killing people who heal a lot like Mundo, Taric, Soraka etc.

E Ability :Shunpo: Katarina instantly moves to her target's location. If the target is an enemy, she deals damage.

Absolutely one of the coolest skills in the game! Its a Blink, making it hard to follow on both enemy and ally teams.

R Ability :Death Lotus: Katarina goes into a state of extreme focus, throwing daggers with unrivaled speed at up to three nearby champions.

Katarina's bread and butter. Katarina is most likely dependent on her ultimate, with its low cooldown and voracity it's almost always up.

HUGE TIP!!!

The Thing most people always tend to do on Katarina is max Shunpo first. Why? Because it does more damage right? WRONG! First of all, Shunpo is a distance closer, while it does do good damage most likely half of the game your still in the Laning Phase. Therefore, to even do that Shunpo damage you actually have to stand RIGHT NEXT TO THEM!!

Ok, yes you have your W for 15%-25% reduced damage ( Depending on LvL ) but it doesn't matter because if you stand next to a champ like LeBlanc, guess what happens...you dead. Shunpo-ing right on them, almost always allows them to do more damage to you then you did to them even with "W". Also, when you use Shunpo to go in, what do u have to go out? Unless you killed them, flash but thats it, which is up a lot less often than Shunpo. THE RISK IS NOT WORTH IT!

EDIT: I will also add that sometimes using shunpo on some enemy champions has almost no risks with it like maybe Ashe or Teemo, however there is always some risk to it especially if your bot lane.

I personally always takeand. Flash Allows another distance closer sense Shunpo isn't always usable because it only works on certain targets. Ignite because sometimes people get away and ignite you cant get away from.

Summoner Spells that Make sense but I Dont take:
Well Exhuast helps during your ult but with Rylais and Hextech Gun They should almost always be in your range.
Ghost is a good escape but flash I always find more useful.
I Guess you could always cleanse and Shunpo away.
You can if you want i find other skills aalot more useful.


Summoner Spells YOU NEVER TAKE!
Heal? I Guess if your new go ahead..Lol?Jungling Kat? lol ok..Rally? Sure..Fortify? Let someone else get it..Clarity? Well she doesn't exactly have mana but lol.

A Very Easy Farmer!

Her skills have no cost allowing you to constantly spam them and her ad even as an AP katarina isn't that bad at all, JUST PAY ATTENTION!

Katarina's Best Friends!!!

Morgana - The Fallen AngelWhy? Because Morgana's Shield Prevents Disables, During your ultimate. YOU CANT BE STOPED!

Amumu - The Sad MummyHow Come Amumu? Because Amumu's Ult keeps everyone in place almost a guaranteed 3 Enemy Champs are hit with Death Lotus!

WardsGive Katarina an amazing ability to get away, even though that ability has been taken away before in previous patches. However, now it is available once more i've got some pictures to help demonstrate where would be a good place.

Overall Katarina is a very easy champion to farm with, get kills, contribute to the team, and be very threatening!