Talk:Karthus/@comment-69.14.62.169-20110710104219/@comment-74.222.244.98-20110710184837

The reason they don't do this is, because of it's short cooldown and low mana cost, you will be using it a lot. They went ahead and made it a natural smart cast ability which is nice, unless you are just learning him. But over time after you have used his Q over a thousand times you will innately know what his limit is, and if you don't, well just walk back to cancel the mistake.