The Rival Executioner card requires that, upon his execution, you take the noble from the top of the deck and "collect" it. My friend drew Robespierre, who, when collected, ends the day.
We didn't like the way it affected the game (my friend was in second place, and it was day three), so we let it go. But I'm still curious...do you reap the side effects of the card drawn after beheading the Rival Executioner?
Rival Executioner reads:
Collect the top noble of the noble deck after you collect this noble
The day ends after you collect this noble. Discard any nobles remaining in line.