|Type(s)||Action - Duration|
Now and at the start of your next turn: +2 Cards, then discard 2 cards.
 Official FAQ
- When you play this, you get +1 Action, draw 2 cards, and discard 2 cards; then at the start of your next turn, you again draw 2 cards and discard 2 cards.
There is no strategy article for Dungeon, but it has been discussed on the forum.
Dungeon is a decent sifter, and a very close relative of Warehouse, except for the fact that it is a Duration. On play, it is weaker than Warehouse, since you only get to pick the best 4 cards out of 6 instead of 4 out of 7. On the other hand, next turn you will be able to pick the best 5 cards out of 7, which is nice.
Most players agree, however, that Warehouse is not a card you just want to play anytime you have it in your hand - it is best used to align certain cards you want to draw together. Examples include Baron with an Estate, Tournament with a Province, Urchin with another Attack and Treasure Map with another Treasure Map. Another reason to use a sifter like Dungeon or Warehouse is to get to your key cards faster; you might want to upgrade your Traveller, or play your Mountebank more often. In some cases, though, you want to avoid decreasing your handsize or triggering a shuffle by playing Warehouse. Dungeon has the weakness of being more inflexible than Warehouse; once you get it into play, you can't decide not to use it next turn. On the other hand, in a pinch, Dungeon can save a turn that would otherwise be a dud, not unlike Guide.
In the List of Cards by Qvist Rankings from 2016, Dungeon ranks 18th among cards, which is above both Warehouse and Guide.
 English versions
|+1 Action. Now and at the start of your next turn: +2 Cards, then discard 2 cards.||Adventures 1st Edition||April 2015|
|+1 Action. Now and at the start of your next turn: +2 Cards, then discard 2 cards.||Adventures 2nd Edition||August 2017|
 Other language versions
|French||Donjon (lit. keep)|
|Japanese||地下牢 (pron. chika rō)|
|Polish||Loch (note: as referred to in Polish Empires rulebook)|
|Russian||Подземелье (pron. podzyemyel'ye)|
 Secret History