NFHS Football & Basketball
Dread Our Coming, Suffer Our Presence, Embrace Our Glory (Solonavi War Cry)
So if the heroes win Ritual of Shadow, and Cardinal's Plight was never even played, the overlord will not have the Staff of Shadows to be taken. Now the rules say treat unplayed quests as if the Overlord won them, but does that mean he should be awarded all the artifacts that he would have won if it was actually played? Nothing in the rules suggests that to me.
It's only treated as if the Overlord won it for the purpose of determining which Act II quest is available (although I suppose thematically you could probably implement a house rule that the OL gets the reward if for your group the OL tends to have a more difficult time).