Turn Paper into Gold

If you had a paintbrush that could do anything, what would you paint with it? If you could build an army with a paintbrush, what would you use it for? If a civilization could be created with just one paintbrush, how would you draw the blueprint? Gold, diamonds, cars, airplanes, cannons, warships, tigers, bears... Please pay attention to the Fantasy Painting Workshop, there is nothing you can't imagine and nothing you can't draw.