Ahri has crazy sustain. I've actually managed to get beaten mid by an Ahri when playing Kassadin, which doesn't happen often. She rushed WotA, and my uberharass could do shit, since all she needed was one charged ball on a minion wave to get back to like full hp, which ended up with me getting more harassed because she'd just activate that homing fox fire shit the moment I'd riftwalk close. This caught me completely by surprise 'cause all the other Ahri players I faced before were total dumbfucks.
I hate facing competent champs for the first time. Makes me fail to adapt propa tactics fast enough