Like the other Fates, he was trapped inside a card of a cursed Deck of Destiny by a witch named Esmeralda centuries ago. He escaped from his card, and went by the identity of Jacks.Jacks and Donatella corresponded with each other, their letters being revealed at the end of Caraval. Jacks went by the alias of "a friend". He enlisted Donatella to find out Legend's true identity in exchange for her mother, Paloma's, freedom. He remained close to Donatella throughout the book, and even gave her a deadly kiss when she failed to bring him Legend's name. However, it was later revealed that she was immune to his fatal kisses and that she was his one true love.