Kai'Sa's Void Seeker

Void Seeker is lackluster. It needs...something. On the public beta board it was suggested it ignore minions (I won't reiterate here; use the link provided if you want to read that post). Personally, I'm fine with it hitting minions; it IS a skillshot, afterall, and one should use - well - SKILL to hit the intended target.

However, it's what happens once it does hit that leaves me feeling the skill is not very useful; mediocre damage, a couple stacks of Plasma which likely won't be capitalized upon as the target will stay out of range until they wear off, a cooldown reduction if it hits a champ (on what is already a long cooldown). Meh, not impressed.

My suggestion for making Void Seeker more useful as well as befitting Kai'Sa's role as a long-range markswoman who then rapidly closes with her target is this:

For each stack of Plasma, target is slowed for 0.25/0.50/0.75/1.00/1.25 seconds.

(With a flat slow percentage regardless of stacks; 35% seems a reasonable, middle-of-the-road amount compared to other champs' slow abilities. At minimum target is slowed 1/4 of a second, at maximum they are slowed for 5 seconds once Void Seeker is upgraded to full and the target has 4 stacks of Plasma.)

OR

For each stack of Plasma, target is slowed by 5%/7.5%/10%/12.5%/15%.

(With a flat slow duration regardless of stacks; 2 seconds seems a reasonable, middle-of-the-road amount compared to other champs' slow abilities. At minimum target is slowed by 5%, at maximum they are slowed by 60% once Void Seeker is upgraded to full and the target has 4 stacks of Plasma.)

Regardless of which option is chosen Void Seeker retains all of its other attributes; the exception being a possible reduction in damage as a tradeoff for the new slowing effect.