How to make the halo and footprint of the dream world?

If you are willing to spend money, you can get it at 30, so that you can exchange your honor for a refined star stone, and then go to the valuables to shoot a set of (9 sets) cards, and be in a constellation with the refined star stone. If you put them in, you can get footprints or auras. If you want to collect them all, you can get 18 decks, or about 18 cards. Other 30 levels can't go to the constellation, they can only spend money to buy it.