Check that the card has the appropriate permissions to be played at this timing. Example: If the state is Showdown Closed and the card was the one that Closed the state, ensure that it has [Action] or [Reaction]. Example: If the state is Closed and the card wasn’t the one that Closed the state, ensure that it has [Reaction].
§ 358.4 Core Rules PDF (officieel)
§ 358 5. Check legality.
