Whoo, i really like the colors of this one. Is the city on top of a cloud or something ? (cause it seems so, and the lower part of the tower, underneath the city, seems to go all the way to the sea / ocean / whatever) !
Anyway, really nice work on colors, just a little bit sketchy (the lines of the houses / tower aren't very neat... but that might be due to the pencil you used :) ). The tower looks like a spear, so maybe the "piercing sky city / tower" (okay......... that is very original i know ^_^').
Good job once again (btw, you need to send me that story of yours, cause i only have the drawings to try and get a glimpse of your world ;) ).
Thumbs up :D