Okay, so I'm guessing from what you said that you are in Lonely Devil vising the A Party for You (Septet) Pop Quiz, and you're looking to get Mammon's UR card "Let's Go on a Date!," correct?
To be able to collect enough card pieces to combine them together and get that card, you're going to need to reach 260,000 points, meaning you'll need to get to page 3 of the Rewards pages.
