In The Writer's Journey Christopher Vogler Moves onto the Reward or Seizing the Sword. This comes after the Black mOment and for a long time I puzzled over this. In many of my books there isn't an object that comes as a result of the dark time when all is believed to be lost. Then one phrase struck me and that was knowledge. Knowledge is valuable to the writer and this is what I've taken from this part of the journey he writes about. Often my characters through a search of themselves or of communicating with other people what is true and what is not. They may also learn more about the person and discover what they believed was false.
I've been re-reading some of my favorite novels by Jo Beverly and she uses the idea of knowledge one character believes to be trus and learns it is false or the character's idea of what it means has been skewed by their own insecurities.
One of my books The Warrior of Bast really does have the heroine and hero recovering treasures after undergoing some adventures that would have ended their lives. But recovering the treasures didn't end the book. They had more steps to take on their journey.