Initial playtesting suggests this is good; Stuart suggests even perhaps too good. Might up the Equip cost to .

I'm torn. It was very fun at and it was obviously very fortunate to be on a double strike flyer, one of the situations when it shines best. So I agree it was good. I think firebreathing has a bad reputation because firebreathing auras are hard to use, but I think it's much better on equipment because you can normally pump something, even if it's at -for-1.

And if you can play some big ground creatures and then pay each before combat to give them flying each turn that's very nice, but not necessarily too nice.

I think you should try it with an equip cost and see if it feels as fun :)

Heh, I love the mental image of a big hulking troll (or a Baloth or something) pedalling on a fragile cycle connected by a flimsy chain to a pair of unwieldy thopter-wings :D

Okay, I'll try this at Equip and Equip and see how it goes.

"Heh, I love the mental image of a big hulking troll (or a Baloth or something) pedalling on a fragile cycle connected by a flimsy chain to a pair of unwieldy thopter-wings"

Yes, ever so much :)

This has been played quite a lot more. It's still good, but I think not too good, and people really enjoy moving it around for 0 mana. So I think I'll be leaving it how it is.

It has the slightly odd flavour, because it grants Flying UEOT instead of as a continuous ability, that someone can crank themselves into the air, then pass the wings over to someone else and remain airborne...

True. But that's part of the fun of Magic's approximation to flavour :)

I think either's fine: "as long as it's equipped" would make sense, but the flavour of someone cranking desperately in order to have enough momentum left to soar through the rest of the turn is also pretty good.