Quack-Ception

The Emperor's host glared at the old man, Doctor Lou spared him a glance and then sighed and said, "But... Since it's rare that the student confounds the teacher, given this monumental occasion, if you tell me how exactly you're doing this... Then I may feel inclined to forget certain words you may or may not have said..." He finished, throwing the blade of grass in the Emperor's direction, and somehow, the blade of grass sailed through the air and landed right in front of the Emperor's - Well, his host's feet. 

The Emperor's host hesitated for a moment, before sighing and begrudgingly saying, "It's the bracelets, I don't know how..."

Doctor Lou stroked his beard, "Hmmm, can I -"

"No." The Emperor's host cut in, "Now, you tell me."

"Tch, no fun." Doctor Lou said, pulling at his beard, "Since you won't let me examine it and that stubborn Xing Xing won't give it either...Then answer my questions or my memory might just fail me~... How does it work?"