I am not seeing how this is an Air card... Impulse seems like something of Darkness as being irresistable, or perhaps Entropy for lack of control.
I will try to explain it.
Impulse is for me something that instantly changes something. Just like a strong flurry that force you to make a side step.
In this case it's like an wind impulse that blows against you. And if you want to go on you have to put all strenght against it (play all cards drawn this turn). If you even want to be faster (draw multiple times per turn) you need even more power to walk against this wind.
My english isn't the best I know. But I hope I could show you my interpretation of it.
Greetings
avantasia666