Misc
Hildir's Bronze Key
It seems to be missing its owner...
Hildir's Bronze Key is unused. The separate key chest that would hold it is never placed in a world, and the 
Bronze Chest from the Sealed Tower needs no key, since Hildir unlocks it when it is returned. Only console commands can spawn the key.
Spawn command
With devcommands enabled, this drops Hildir's Bronze Key at your feet. The ID is case sensitive; the last number is the amount.
Item ID: HildirKey_plainsfortress · see the spawn command or all console commands and IDs