We all now katarina. At least a bit. We now that she is truly deadly and that she can burst down enemys in 1 vs 1 and be really anoying in a teamfight. But master her is one of the most difficoult and rewarding things you can do if you like this deadly melee fighter. So get a cold drink and sit down. Because we are going to analyze all about her.

This is Katarina passive ability. It´s effect is that you`r basic abilities cooldown's are refreshed and your Death Lotus cooldown is reduced by 10 seconds when you kill or assist in a kill of a champion.
This AWESOME abilitie is one of the best team fight passive in the entire League Of Legends. This is the abilitie that will make you deadly in the team fights and will easy you to wrap up double kills very easily.

With this ability you will throw a bouncing blade that will bounce to the 4 nearest enemys (5 in total) dealing 10% less damage with it bounce. It also leave behind a mark that can be consumed with a basic attack or an ability to deal extra magic damage.
This is your main damage source in early game and this will make farming so much easy. Level it up as soon as you can and make the pain out of them in the early game.

sinister steel Katrina deals magic damage around her, gaining 1 sec bonus moovement speed if she hits an enemy.
With your Bouncing Blade this is the ultimate farming tool. You can also use it to escape of extreme situations using the speed boost (44% at level 5) or deal damage if enemys get too close.

You will teleport to a target, dealing damage if its an enemy. After the jump, you will take 20% reduced damage for 3 sec.
This is the ultimate mobility tool. This will aloud you to leap in and out of battle. This will let you escape from the most extreme situations. THIS will save your life... and shorten your enemy's.

Katarina spins in her place, throwing daggers to a max of 3 enemys in her radius. Also reduces in 50% the incoming healing of the targets.
With this ability you will burst down enemy champions and put tons of damage in team fights.

Pros + ¡No mana needed! = SPAM LIKE A BOSS + You can burst down enemy teams with her awesome Voracity + At high levels, all of you'r abilities will be in low cooldowns. Spam them! + Shunpo will help you be super mobile in team fight and let you scape from nearly anything. You can carry sight ward to jump to them. + ¡No skillshots to fail at! + She is Katarina... + ¡Sexy and deadly!

SPACE

Cons - Very focused in team fights - VERY FOCUSED - Can cut your Death Lotus with CC (Stuns, etc) - Melee range = Difficoult to farm

A good combo will make dessapear any enemy in you radius of action. Dealing the amount of damage necessary to kill the target sometimes is the difference between a good or a perfect combo. Here you can find the succesion.


In range of Bouncing Blade :

Bouncing Blade + Shunpo + sinister steel
*You can finish with Death Lotus if you will kill the target or in late game (low cooldowns)

Not in range of Bouncing Blade :

Shunpo + Bouncing Blade + sinister steel
*Add Death Lotus if needed
*Need more skill to do this combo correctly

You are already in melee range :

Bouncing Blade + sinister steel
*Whenever he scapes Shunpo + Death Lotus
*If he atacks you Death Lotus + Shunpo (to scape or catch your target)

RUNES
This runes i recommend you to use with katarina have a reason. Let me explain them and you will understand why I chose them. Of course I will aprecciate any suggestions the comunity can give.

Greater Quintessence of Ability Power

Easy. Flat AP to let you dominate in the early game. With flat AP you gain that burst of AP you need to wrap up kills and get feeded.

Greater Mark of Scaling Ability Power

¿Who doesent love loads of AP, doesent matter whatever the items you have? This is a normal pick in AP carrys and assasins. Nothing new.

greater seal of vitality

No matter if your lane opponent is Ap or Ad. Health always is usefull. Thinking it, it's not usefull but necessary in all aspects. Add that 5 champions will focus you in any team fight where you are out of possition, and there you have the reason.

Greater Glyph of Cooldown Reduction

Less cooldowns in early game is equal to more damage and more harras. With a bit of skill, you will be the lord of the mid lane.


MASTERIES
Masteries are the default 21/9/0 you will find with Katarina

Start:

First items to by are reccomended to be the normal Boots and 3 Health Potion. But you can change them for a Doran's Shield if you think it will be tuff or to a Amplifying Tome and more Health Potion

Early:

Firs to do is a Hextech Revolver. You can use the Amplifying Tome to make it cheaper. Once you have the Hextech Revolver you start purchasing Rylai's Crystal Scepter. This will give you extra sustain vith the 500 health and more AP. You'll need tha sustain in mid and late.

Mid:

Start your Hextech Gunblade with the Pickaxe if you can. Build the bildguewater cutlass and finish your second definitive item as soon as posible. The Hextech Revolver's active will slow a 50% the target speed. This will allow you to chase down more effectively. Try to use it like an Exhaust and to make targers to be more time in you'r ultimates Death Lotus

Late:

The typic Rabadon's Deathcap and the Lich Bane will give you more AP to burst them down. Another Rabadon's Deathcap or a Void Staff will give you the flexibility you need. Add Guardian Angel or a [thornmail (to defend from AD)