Hey guys, this is my first guide for my favourite champ. I have almost no loses with Kassadin, using this build. Actually I almost never have a full build of kassa because the enemy team surrenders before I even buy the 4th item :D This build makes him a lot ap, and a very good amount of health and mana. And if you have the blue buff, you can riftwalk around the map like a boss. If you don't need the 500 health crystal scepter gives you, you can replace it with a rabadon's deathcap or a mejai.

Use your null sphere to harras enemy champ as much as you can. Try to keep him in distance with sphere so you can farm.Try to last hit with nether blade and use it to stack archangel staff late game. Make combos with a very fast riftwalk,null sphere and then force pulse, if you think you can kill the target try to hit them with normal attacks with nether blade enabled if not, do this couple of times and the guy is dead. This combo is very good because you silence the enemy and he can't do anything. But be careful this requires very fast fingers, and a lot of mana(about 300) so till level 9 don't do it very often, because you lose your mana. If you want to save an ally port to the chaser than null sphere and then force pulse. This way he's slowed and silenced, stops ad's and ap's