We are not putting my old heart in the nasty swamp water! Hags live in there!

[probably!!!

she holds the box closer to her chest. she does not know this but i will tell you right now it is not preserved, magically, help. and then:]

... The process of putting this one in wasn't fun, so I don't really want to re-create the process, Gale. [she says, expression sour.] I don't know how it got here. I'm not even sure it's actually mine, like I know what it looked like. Could be any old heart that they put in my box to be funny.

[this seems like a funny prank a devil would play, tbh]