Talk:Karthus/@comment-15031918-20150609232301/@comment-25904283-20150619220810

You can harass with Q but remember, it's far from being an easy to hit skill shot, and its damage sucks if she stays close to a minion. On the other hand, LB has 2 very easy to land skillshots and 1 point and click. Karthus can do well in long trade, but we're talking about LB, who is the queen of burst and never willing to take long trades.

In an equal skill match up, you won't win. Best thing to do is try to not feeding (play very safe and accept to fall a bit behind in cs) and outscale later (which tbh Karthus can do vs anyone).