Well, more of a stylized version of fire, really...
Originally, I thought about giving Ulqy angel wings, but because he's pure evil awesomeness ('scuse the fangirl moment), I added some evil "wings" instead.

Credits:
*Winter_Breeze_Brushes by Axeraider70 (I just love these)
*The Bleach manga (obviously)
*The Death Note manga for the skeleton wings