📦
Quest
StackableTradeable
Heavy brass key the length of two fingers, ward cut in a pattern unlike any in the locksmith's standard book, bow stamped with a pictogram that reads the same from either side. Warm to the touch in a way that has stopped surprising its current bearer.
Entry
Chronicle
Falls out of pockets that did not have it a moment earlier, at the end of fights that did not seem survivable, in rooms where nobody has had time to check for ambient magic. The key fits exactly one door in its lifetime, and everybody involved tends to agree on which door without having to discuss it. Retired adventurers keep their old ones strung on a cord by the hearth, as a small defense against the assumption that the work is ever fully finished.