Ehm I was just trying to explain it in a simple way , but why don ' t you read the full article , here ' s another source freeprojectinfoAnd you go explain it in a scientific way <| sep |> I so wish I were that man . <| sep |> I ' ve played quite a bit of Karthus top on my main and smurf , I think its just really nice . I also noticed for one patch he had an insanely high winrate so thought I would try him out . Don ' t think he has changed too much and I would say the fluctuations are most likely just because of the small player base . Karthus has amazing dueling potential and very strong kitecounter engage . Basically if they enemy cant one shot you with combo you usually end up destroying them . Since top is a lane of small advantages , having ult is amazing pressure as it provides kill pressure without having to burn TP . So its easy to punish tps . I would run a basic AP page magic penarmormrAP and deathfire touch masteries . I dont take W until level 8 , but taking it level 4 is fine . Basically just farm and harass when you can , because you ' re a mage top your laner usually struggles to pressure you from CS . I almost never TP gank , your ult does the job good enough and I use tp for lane pressure and safety in case I fall behind . You ' ll find that eventually you either start winning lane because you ' re super farmed and can kill your opponent or you turn into a late game AoE monster anyways . Only problem I have with Karthus top is that he isn ' t really what you want from a top laner no good cc , not a good frontline IMO . 810 would recommend