Great work, the poses are all very dynamic and powerful and the elements look very lifelike. You nailed Korra's expression, and the foreshortening looks awesome. Her water looks especially realistic, and the shadows in the background were a nice touch. Keep up the good work!
WOW! This is amazing I can't believe the amount of detail (especially in the grates and water at the bottom) and I love how it recedes backwards just like in real life. I also think it is really cool how your watermark looks like it is laying right on the floor because it is underneath the water.