Kassadin needs a minor rework

is one of my favourite champs, and I am psyched that he is getting buffs to his ult in the PBE. However, he is still undeniably weak in the current meta, and there are a few changes that could be made to help him survive and thrive on the Rift.

First off: Kass's passive. Void stone is cool. Ignoring unit collision is only on a few champs and that makes him unique. However, 15% reduced magic damage is a passive that doesn't scale into late game when you're an assassin like Kassadin. Void Stone should be like an inverse Runic Skin. Kass should gain MR equal to 15% of is AP. This is a small nerf to early game, giving ~5 MR with most Kass starts, but in late game can give 70-90 Mr. This also fits the theme of Kassadin's void magic being strong enough to render other mage's magic "null and void".

Second: His Q Null sphere is just not that great. With 170 base damage at rank 5 and an AP shield scaling with 30% of his AP on hit, it is hard to use it for either damage or defence. I know many people want to preserve targeted abilities in League for balance purposes among the numerous dashes and blinks champions have, but skillshots do more damage and that is something Kass desperately needs right now. Null sphere should be a longer ranged skillshot that passes through minions, similar to Ezreal's W, and gives Kassadin his shield on cast. This allows for more counterplay against Kassadin, while giving him an ability to outplay other champs. The AP scaling on the damage should remain the same, with a higher base damage, and higher AP scaling on the shield, around 50%. This is the same amount as 's shield, but since it only blocks magic damage and has the cast time of a skillshot it is still balanced.

Third: His W Nether blade is kinda weak as well. It gives his autoattacks 10% of his AP as magic damage, and in a world of s and s this is extremely underwhelming. But instead of just buffing it, this can be much more interesting. Make it a toggled ability. While toggled off, Kassadin's autos still do 10% of his AP as magic damage, but every third autoattack restores half as much mana as it currently does, still quintupled against champions. While toggled on, all of Kassadin's autos still do 10% of his AP as magic damage, but now drain (2/4/6/8/10)% of his mana and deal magic damage equal to (10/15/20/25/30)% of his target's AP. This solidifies his niche role as the mage-hunter, and makes farming and harassing in lane more interesting.

Fourth: His E Force pulse would benefit from a few small balance changes, such as a higher base damage, a wider radius, more stacks needed to cast, i.e. 8-9, and a new element: Force pulse drains 33% of the target's current mana/energy. In lane this would be much less spammable, but it would make mana-using opponents more conservative with their spells, either because of the mana drain or to prevent Kassadin from actually casting the spell. In teamfights this would be very potent if cast 2 or 3 times, denying a few mana-hungry champions such as or their ults, if Kassadin hasn't already killed them.

Finally: His R Riftwalk is, in my opinion, a great ult. The only change it needed, damage, is something Rito already put on the PBE.

That sums up my ideas for a rework! Comment whether you liked it, hated it, or your own ideas for changes to Kassadin.