She's getting antsy, and it's not surprised considering what she has been through.
Mulberry decides to head back towards the blacksmith's. Upon entering she hears the normal clanking of metal on metal, and approaches carefully.
The blacksmith notices her, and says, "Jobs done. Take it."
He then motions to a corner of a table and goes back to work.
Mulberry picks up the key. It looks exactly like she thought it would, and the mare has to admit that if he weren't a monster his talents could be quite useful.