DALLAS—A group dedicated to finishing the work of World War II’s Monuments Men is betting on a deck of playing cards—and reward money—to help find missing works of art taken by the Nazis. Inspired by the U.S. military’s history of creating playing cards related to missions, the Dallas-based Monuments Men Foundation for the Preservation of Art on Wednesday announced the creation of the deck focusing on works—including paintings, sculptures, and reliquaries—they believe still exist. “What is needed is to raise awareness about what is missing,” said Anna Bottinelli, the foundation’s president. “Because you might know of a friend who has a beautiful painting on the wall and you don’t even question that that painting belongs to someone else.” The group, which is offering rewards of up to $25,000 for information leading to the recovery of each cultural object featured in the deck, will highlight a few of the cards each …