Her tactic works. While one of his arms goes slack, the other isn't prepared for her focus doubled upon it. With a snap, it bends at the elbow, rigid and involuntary, with his fingers bending awkwardly at their joins. His forearm quivers as he fights to straighten it back, but he only manages it partway. A new crease appears upon his brow, perhaps from some sort of defensive strain.

Somnus' eyes narrow sharply at his bent arm before refocusing on her. Then, keeping his attention on her, he begins to walk. His path is a semicircle about her, testing if some movement disrupts some of the tension of her magic.