Referential Play Clues
- The "referential" part of Referential Sieve indicates that cards next to the desired cards are clued, rather than being clued directly.
- To get an unclued card (the Target) to play, a colour clue is given to the unclued card immediately to its right (the Focus).
- If no new cards are clued, this is instead a Reclue and is covered in level 2.
- To get a previously-clued card to play, reveal it as a playable.

When multiple cards are clued,
- The Focus of the clue is the leftmost newly-clued card, except slot 1 has the lowest precedence.
- This means that slot 1 is never the Focus unless it is the only newly-clued card.
- The Target of the clue is the previously-unclued card to its left, wrapping around to the right side if necessary.

- Note that play clues can target newly-clued cards as well, since they were previously unclued.
