As Nocturne (edit: probably) has no Events:
Nobility, 5$, Event
You may discard a Province, to take Baron's Grace, Duke's Grace, Heir's Grace, Duchess' Grace or Margrave's Grace if you don't have any yet, but not from another player.
Baron's Grace, State
At the start of your buy phase, you may discard a Victory card to get +3$.
Duke's Grace, State
+1 VP per Duchy you have.
Heir's Grace, State
At the start of your turn, you may reveal a Victory card from your hand, to get +2 Actions.
Duchess' Grace, State
At the start of your turn, you may discard a card for +1 Card.
Margrave's Grace, State
When you buy a Victory card, each other player discards down to 3 cards.