it almost looks like the blue light from that tall tower is making the city raise from it's place on the ground. it's gorgeous work!
What's your inspiration for this piece?
It actually just came to me from random thumbnail drawing
I love it when there are all kinds of things to see in an image!
I originally thought of it as some sort of huge mana source they build their city on .
Don't think this city will last long though, doesn't look like a very stable floating rock on a mana well
So, to use your city image as an example: The mana well is not necessarily liquid, or unstable. The rock that the city is built on is actually quite stable, and sitting in the middle of the pool; you just can't see it due to all of the special effects of the glowing well. Or, the local mages who helped build the city worked the structural integrity into the well itself with their enchantments, so as long as the well exists, it not only supports the city, but strengthens it as well. (In this case, sort of like how General Products spaceship hulls are built with tiny power sources in them to artificially strengthen the atomic bonds.)
And how would the local mages take advantage of this? Even without knowing the details on how the magic works in that world, one way to take advantage would be to build things that couldn't exist without that active power source: floating gardens (as in, suspended in air); sculptures or structures that couldn't support their own weight; non-corporeal streetlights; etc. It's when you work out the details on how the magic works (ie, the local physics) that you can really figure out the most efficient way to utilize it.
Sorry for the rambling; I used to GM and worldbuild as a hobby. I once detailed out the daily routine for enchanter mages just in case anyone wanted to know what those dudes are doing for the 6 months it takes to enchant that +3 flaming sword.