Warden Page 406 (Patreon)

Insight is disassociating here into a safe place within her mind. The Prisoner is flexing by letting her know he is completely aware of what she is doing. He is heavily implying that her current ability to cling to sanity is by his design. And it is true. If he wanted to dispel her magic, he has a mana disrupting shackle in his right hand.