The overlord has access to a card called Poison Dart (or Poison Dart Trap) that can be played whenever a hero opens a door or searches.
When a hero searches, does this card get played before they reveal an item from the search deck or after?
It is important as the overlord may decide not to play the Poison Dart card if the player got an item that can immediately discard the poison condition (such as Curse Doll).