Meh the reason why nightfall|eclipse is not considered imbalanced although eclipse gives +2|+1 is because
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and
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creatures are inherently weak, even their respective dragons. Before casting they run the risk of being wiped out by FS, and after they are still pretty vulnerable to creature control.
I still can't memorize what is and isn't airborne, but for +2|+0 I still think Jet Stream ought to be nerfed slightly. Perhaps, as I recommended with the wings idea, affected creatures should have a 'take off' step, whereby they are stuck in a time bubble for one turn following the play of Jet Stream. If you implement this then maybe reduce the costs by 1
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each. Hope you do get some art for it, and all the best refining the card idea itself. Just my 2 cents worth
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