Flooders

You can link the treasure vault to a Homm, I can't even imagine who lives in the swamp, the forge is for tough guys who like to have a drink or two in the morning, various Vistri live in the rocks, and Fluttershy lives in the garden, 100% sure. And I won't say anything about the castle, let the author be ashamed of their modesty ~_~

Added 2 minutes later
And does a water devil live in the well?