Again, not sure of cost, size of effect or speed, but it makes sense in this Aer/non-Aer set.

Interesting. Red has a history of doing this kind of thing, dating back to Earthquake vs Hurricane. I like that red supplies the "hit all nonflyers" and black supplies the -X/-X effect.

I have been wondering whether green would get a Hurricane effect. Perhaps in set 2, like Creeping Corrosion and Grafdigger's Cage.

"I like that red supplies the "hit all nonflyers" and black supplies the -X/-X effect."

Yeah :) I'd just gone through several "stapled together" cards, but then this one seemed just right. It's slightly odd that one color could be seen as supplying a restriction (since black can sometimes hit all creatures), but if you think of that as "all creatures without flying" rather than "one creature" it makes sense.

­I have been wondering whether green would get a Hurricane effect.

Me too. And yeah, green should certainly get plummet, and I think it should certainly get a hurricane somewhere as it's so appropriate, but you're right, second set makes sense.