To Mordred, the worst reaction is one that doesn't acknowledge her. Shang Tsung's reaction time is impressive, but after multiple balls fail to find their mark, or even draw out any obvious sign of annoyance from him, she scowls, hops off the table she'd been sitting on (chairs are for squares), and makes her way over to him herself.

"Hey, old man." Is her polite greeting. She tilts her head up and stands on her tip-toes to try and follow his gaze, though she still falls well short of matching his height, and therefore can't make out what he's looking at. "What's so interesting about some dusty old tomes?"