Black Sonata
When a fog card says to discard a clue card of your choice, which clue cards can you discard?
One forum reply gives this reading, and it fits the rulebook's rule that an action you cannot perform loses the game.
- rod3556lhs · Community · 2020-08-15
Only a clue card you have already collected and keep in front of you; you then draw a new clue. If you have no clue card to discard, you cannot carry out the action, and the game is lost.