Talk:Rylai's Crystal Scepter/@comment-76.8.3.200-20120523084827/@comment-62.1.231.76-20130106231101

It's a special condition, Karthu's Q spell is considered fully single-target if it damages only one target, even though it's still always an AOE spell to apply (you don't click it on a real target but on the floor beneath them).

This special condition exists so that Karthus will actually be able to farm effectivelly during early game, otherwise he would be an early-game mage who can't early farm right.