Karthus needs a re-work

Karthus's title says "Death Singer" and yet he only has 1 ability that is sound related "Requiem" all the rest are related to deaht and despair which is kind of understandable but "singer" is also in the title, therfore i concur that a Karthus rework should happen based on the lack of synergy with his name and the role he plays in games .