Talk:Karthus/@comment-87.120.65.203-20120324144349/@comment-98.164.229.83-20120327203800

Quote "It doesnt REQUIRE much skill to use, it has a high skill CAP. It means that everybody can sometimes get a kill just by pressing R, but MASTERING this ulti is a very hard task - you need to know almost everything about all enemy champions, items, resistances, cooldowns etc. and continously calculate these values, finding out if it is worth to press R now (or maybe you should wait). So, the difference between great Karthus and only a fair one is large. "

....

This ^^

BTW, all ults are like this