Robert Downey Jr. stands in a floating castle above the clouds

Robert Downey Jr. stands in a floating castle above the clouds, dressed in a Norse wizard's robe and a cape that looks like it's made of aurora borealis. He's in a magical library filled with ancient scrolls and enchanted artifacts. The scene is lit by a golden and green light, with the city below visible through the castle's windows. The photo was taken with a Canon EOS R5 and a 35mm f/1.2 lens, capturing the ethereal and magical ambiance.