Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Katarina, The Black Mamba
Reach is to harrassing your ennemy with your Bouncin Blade to wait lvl 2. When you've got Shunpo, party baggan. Use Bouncin Blade to down your ennemy of 2 way. In first target, so use shunpo to escape on friendly minion. Or use foe minions to reach him.
When he is weak enough, use shunpo on him and bouncing blade if try to escape. when you are lvl 6, use your ultimate after shunpo, and then Bouncin Blade.
This is good for ALL the game, and it works against 1,2 and 3 ennemies if you have been fed.
In TF harrasse them with BB and do Shunpo on friend. Then, let te Tank take agro and shunpo on him or no hrage ennemy, and active your Ultimate. Use BB to take fleeing ennemys.
If you have Tryndamere in foe. You must be agressive, but don't try to kill him. let him activate his ulti and do a Shunpo to escape, if he try to follow to, he will die. Exhaust to slow him, Ignite at the end of his ulti, adn when it finished, BB'cd is finishid to. launch it on him and when your Shunpo'cd is over, FINISH HIM !