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What would be the best way to protect a room from unwated visitors in a low-tech fantasy world? (lemmy.blahaj.zone)

submitted 1 year ago by hungryphrog@lemmy.blahaj.zone to c/asklemmy@lemmy.ml

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I need this for a book I'm writing. A lot of people know about the existence of the room I'm talking about, but almost nobody has access to it.

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[–] humdrumgentleman@lemmy.world 3 points 1 year ago (1 children)

The room is filled with a deadly gas. Either it is built so that it vents into the room naturally from deep under ground, or a diffuser is periodically refilled by whoever controls access to the room.

The McGuffin is the antidote to the gas, which you must obtain and administer before entering.

[–] perviouslyiner@lemmy.world 2 points 1 year ago

One way of getting a very localised danger like this would be to put it near radioactive ore deposits? You can only go in with a lead shield, and have to angle it correctly