Magica thinks there are souls inside that weird vending machine that's not giving anything for free. If souls can be sealed, then maybe magic can too!

[Even though Filbo says that, the face he makes seems to indicate he finds the idea kind of anyone thinking there are souls in there kind of funny due to how outlandish it is, if...]

...she better not be right about the part about souls in the vending maching.

[...somewhat unnerving.]