Perilous Gift

Shadow Dance… was both the Legacy of his Aspect and a battle art Sunny had invented. That battle art was insidious, shapeless, and ever-changing… its purpose was to steal that which made the enemy strong and use it to destroy them. 

The first step of Shadow Dance was the foundation of this ability. Sunny had mastered it during his bitter battle with Nephis, whom he knew all too well. It allowed him to peer into the very essence of the enemy's battle style and gain an almost supernatural understanding of what they would do, as well as the ability to mimic it. 

The second step was a continuation of the first. It was the same in all aspects except for scale. Assuming the persona of Mongrel, Sunny had battled countless Awakened and absorbed their styles in order to make his ability more ubiquitous. He had mastered it during the final battle of the Dream Tournament, facing Morgan.