Katarina, The Sinister Blade

Katarina is an AP based champion and is a good meele asassin. She is also good with a little bit AD like in my build that helps her do more damage if all her abilities is on cooldown. This is Katarinas most Over Powered build.

The runes I used is more pure AP in the start of the game but is also good the whole game. U can switch the runes I used to: Magic Pene, AP per lvl, AP and AD and play with that.

The masteries is for pure ability power and a little bit defense for durability and damage.

The Hextech GunbladeIs the Hybrid item in the build. U ater with boots of speed and HP pots for the quickness so u can harass with your Bouncing Blades without taking any damage. Rabadons Deathcap is for the high AP, the Void Staff is for making more damage because of the magic pene.

Bouncing Blades is the most important skill with it u can harass the enemies down. The shunpo is both an escape tool and a chasing tool and is important to take in lvl 2 or 3 (I preferr U take it in lvl 2) Sinister steel is for the most the farming skill.

Ignite and Flash Is the best Katarina for the Escape tool and the extra Damage

Pros:

Good Combo
Good Asassin
High Mobility
Good Early and Mid Game
Super Ulti

Cons:

Bad Durability