QQ pets, what's the use of collecting all 12 star cards? Help the gods.

Q Pet constellation card use: 1) Break into the Golden Palace (recommended) 2) Open the constellation diagram attachment: After opening the bronze constellation diagram, you can get one of the following prizes at random: 1, deep mountain rain dew (hunger +540)* 10 2, vehicle-dragon (700YB) 3. Force +60)*2 4. After opening the Silver Constellation at 200 points, you can get one of the following prizes at random: 1, Pumpkin (Hunger +720)* 10 2, Jin Xin Jinyi (Hunger+1080, Charm +75 * 2 3, Vehicle-Phoenix (700YB) 4. After opening the golden constellation, you can get one of the following prizes at random: 1, fragrant flower petal bath (clean+1800)* 10 2, romantic and warm (hunger +65438) intelligence+100)*2 3, attribute 500 points 4. If the synthesis fails without using cards, the fragments used for synthesis will disappear. Using Gem 100% succeeded; The card also has a high success rate, and even if it fails, the synthetic fragments will not disappear. 4) The card task of caring for elders (uneconomical) is rewarded as follows: 2 cards /3 cards /4 cards. Task reward: 25 ingots +5 points /50 ingots +5 points /60 ingots +8 points. 5) Entry rules of card magic game: 1. You must have at least 2 star cards to enter. Q Who is sick, working or studying? 2. Enter the game through the "Card Magic Disk" in the right-click menu; 3. Before the game starts, each Q pet baby needs to put a card on the magic disk; Select the card you want to put, and then click "Out Card". 4.6 users play a game, and after all 6 users collect their cards, they can start a game; 6) Open the door with a wand (it is not recommended to play if it is not cost-effective) Note: 4 cards are combined into a wand.