the reason for mentioning air is that it has been increasingly marked as an offensive element, given its more recent additions. i would not be shocked by a glass cannon to be added to air in any way shape or form.
the only basic card i can think of which has a higher atk than its cost (and isnt a 0 cost card like spark) is frog, and that has the outdated 'life creature bonus' in play, and it doesnt even have a skill/ability. 5 damage/turn for 4
basic with an ability does not make sense to me in any way shape or form, but its your card, do with it whatever you want.