Depict the following scene in the medium of digital art: A resplendent angel descends from a celestial backdrop, draped in a cloud. This divine entity features a radiant countenance that emanates a warmth and radiance comparable to the sun. Upon its head adorns a rainbow, adding an array of colors further enhancing its heavenly aura. This mighty angel also possesses feet, which are visualized as magnificent pillars of fire, signifying its strong presence and power.