Exposure.
On their turn, an enemy with faction pieces in a clearing with a facedown plot token may show the Corvids a matching card to guess the type of plot token in that clearing. If incorrect, the Corvids say “no,” and the enemy gives that card to the Corvids. If correct, the enemy removes the plot token
(scoring a victory point); if this removes a Raid token, it does not place warriors.
(You cannot use Exposure once you have begun the last step of your turn. See 1.4.3.)
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1.4.3 - End of Turn)