Guiltythree
He is a shadow during shadow step, he now is taking the shadow form of his and molding it into reality through shadow shell (which normally was used as a sort of armor for Sunny’s physical body). He’s fought in this form prievously (just not in a physical state) in his fight with the shadow awakened, the reflection, and during his fight with nightmare/ravenous fiend. I expect that this form will make him nigh invincible as he is just a conglomeration of shadows and can’t be hurt by physical means. I expect this will allow him to now not only replicate the moves of his opponents but also their physical appearance since he is no longer limited to size.