I agree, great art!
Now to the card concept... it's interesting. Similar effect to Sundial, but single-target? It isn't a Delay, as that would prevent the creature's ability being used. I would almost say make the ability free or mono-element. Why? Owl's Eye can kill creatures, thus able to disable more than one at a time. That said, this has a couple distinct advantages... it's able to lock out a creature with more than 3 health instantly, while you dispose of it some other way. The stalling doesn't accumulate like Owl's Eye does, but it IS immediate.
Consider switching this to a Light weapon with a Time ability cost - it fits the theme of Time better, and I don't see any problem with making this a full-on one-turn delay. Some nice combos with Procrastination and Sundial (which uses Light, woot), plus Time can always use a little more stalling.
On the other hand, the ability costing an Air quantum does mean you can fit unupped Flying Weapon cards and make it a 4-6 creature lockout. Would be an interesting combo for tournaments.
Good idea overall, but I am really not sure if this needs tweaking or not! One thing I would DEFINITELY do right away: drop the ability cost to 2 unupped, at most. 3 is pretty steep for such a temporary effect.