>>725296512
If you're actively rolling for the Secret Pack, I would even advise to wait and see if you get enough copies of the URs to not have to buy the Structure Decks, but if you don't care about the alt-arts, just buy them and craft the two copies of Lady's. In a rare show of generosity, Konami made both Filia Regis and Cehrmba SR, so Dragonmaids remains as the cheapest beginner deck you can craft. Ideally, you also want a couple of copies of Dark Evaporation and Light Sublimation and a handful of Bystials, but outside of that, the deck is very cheap to build in its basic form.