The card already has momentum. I am relatively new to the game and don´t have much experience in the balancing of cards, but don´t you think it would be overpowered to have both airborne and momentum capacity? Skyblitz on this creature, if having an airborne capacity, would make it too powerful. Skyblitz on most Dragons can at least be stopped with a gravity shield and those who don´t (e.g. Ruby Dragons) are very sensitive to creature control such as rain of fire or ligthning), which would not be the case with an airborne chimera. One thing could be to prevent skyblitz or other buffs combination on chimera in the same way as parallel universe.
It's going to be absurdly hard to get high damage creatures, play chimera, AND also play sky blitz. Besides, that chimera without sky blitz could probably end the game anyway.
And also replying to the previous comment: foil chimera doesn't look airborne in the picture
It's apparently standing on the ground.
Anyways, I'd like it to be airborne as well, not because of sky blitz, but just concept wise.
(And also in case the opponent has lobotomized my chimera and he has wings up?
)