Why is it not okay for Kassadin to chase you down across the map when mobility is his identity
But it's completely acceptable for Fiora to do it? Why doesn't her dash not have a scaling mana cost? It's absolutely ridiculous how utterly low her mana costs are. I don't care if she's meta or not, she is absolutely one of the most unfun champions to lane against and that's a big reason why.
For reference, I'm referring to Fiora once she completes 20% CDR, which isn't hard considering BC is one of her main items.