Strange can't help but simmer with annoyance. Because he knows that Billie's right. He knows that he could lose his magic and that he would be shit out of luck if he didn't have his magic. But at the same time? He desperately does not want to admit to Billie that she's right.

So, as he pushes himself up off of the ground, he attempts a compromise.

"At least let me use my magic to bring the knife back to me after I throw it. That doesn't involve aiming—and if anything, I need to work on catching just as much as aiming."