If you look at the art, it is clearly balanced precariously on one tentacle.
Not. Airborne.
It's not really that clear.
I was going to say that if that tentacle was touching the ground, it would be end-to-end with its shadow (as the humanoid figure in the art is), and instead the shadow is lower down. Then I noticed that the chimera's shadow falls behind it (from the camera's point of view), even though the sun is also behind the chimera. ??? (Or if that glow isn't the sun, the art still has the chimera's and humanoid's shadows falling in opposite directions.)
I haven't played with Chimera, so I can't say if it needs a buff, but I agree that the art isn't a reason to give it one -- especially in an online-only game like Elements, where the art can be changed instead. I'd also say that Vampire has the opposite problem: it's airborne but appears to be walking on four legs, two of which are visibly end-to-end with their shadows.
In fact, MtG has a card with this same issue. The art of Whippoorwill (
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=1781) shows a bird in flight, which often causes players to mistakenly believe it has flying when they see it in play. However, the card is old enough that it's only legal in eternal formats, which allow almost all of the more than 11,000 cards ever released. (
The Dark was the only set that included the card, so there was no opportunity to change the art.)