From the Kickstarter campaign:
This add-on includes 5 standard-size decks of cards, one for each of the major aspects of character creation: Backgrounds, Occupations, Drives, Rituals, and Equipment. Each card has original artwork and supporting text.
The cards can be used to quickly generate whole characters at the table or to randomize certain aspects. In Trophy Dark, they eliminate the need for a character sheet. You can also use them to build character creation decks tuned to specific incursions.
The cards are designed to make Trophy easy to play at conventions or as a pick-up game. You can build special decks tuned to specific incursions and then just tuck them in with your dice. For example, if you're running The Flocculent Cathedral, you might construct a deck of religion-focused options. If you're running That Silent Howl or Gift of the Sea, you might choose the nautical options.
In addition to making character creation quick and easy (and focused!), each card has leading questions the players can use to deepen their understanding of the character. What does it mean to be an Oracle? What does it mean to want to free your brother from Barsul Prison? Why did you bring a box of your grandmother's ashes with you? The questions on the cards help guide those conversations so your storytelling is rich and dramatic.