I need a new Karthus skin.

So I feel like he has a nice amount of skins and everything, but let's be honest: who cares about the amount when all of his skins have the same visual effects when he casts his spells. I don't really care what kind of skin he gets as long as he gets one with new visual effects. 1350 / 1800 would be the best though. Any thoughts? Ideas? Agree? Disagree?