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.
First and formost this build is my opinion; so don't rage at me if you think somethings wrong. second of all, try not follow this build religously. and third have fun with it :P
Pros / Cons
one of the best gankers in the game
also one of the best chasers in the game
can deal high damage in a short amount of time, aka a nuke
has the best escape in the game in the form of RiftWalk
Is usually squishy if you don't get the proper items
A little challenging to play
Mana hungry early game
Weak early game
Null Sphere Kassadin's silence and early game harass. can also be used as a last hitting tool. I level up this ability first because it does ton's of damage. not to mention the amazing silence :P
Nether Blade A useless ability on AP Kassadin for the most part. all it does is increase armor pen and restores mana per hit.
Force Pulse Kassadin's main nuke ability. basically it charges up when people, enemy or friend, casts an ability. once it reaches 6 stacks you use the ability. its a cone in front of Kassadin, so keep that in mind.
Riftwalk Kassadins most iconic ability. basically it causes you to flash forward a few feet in front of you. every time you cast this ability the mana cost and damage increases.
Teleport my personal favorite. because Kassadin is weak early game, you have to go back decently often unless the other teams player/players are horrible.
Ignite Such a useful ability throughout the game. Because your a nuke, there is sometimes where they have just enough health to survive. Ignite Negates that. Late game its mostly used as a healz negator(which is in itself usefull).
Flash I use flash in 3's as Kassadin. Reason being that you can trick them by riftwalking away and then Flash back right through them, which throws almost everyone off.
Clarity Useful when you have trouble with mana throughout the game or have trouble managing it.
[Heal] You can use Heal to bait people. when your low health, pretend to blue pill and then press heal and kill your opponent.
Early Game (lv's 1-6)
Early game you basically want to avoid dying. Don't rush in just to get that low damage harass off, only to lose half your health. This obviously varies depeneding on who your laning against. For example, if your laning against a Vlad, you shouldn't even bother with harass until later unless the Vlad is is the worst. On the other hand, if your laning against a AD or AP Carry, harass them as much as possible.