The game "Magic Field" is the most cost-effective way to buy a constellation baby by sacrificing a deputy baby to the undead. Constellation baby was born in one week, sacrificed 60 points, and the task was completed in 5 minutes. You can summon 1 baby after sacrifice, which is absolutely cost-effective. Compared with other deputy babies, the price of constellation baby is relatively low, and you can get 1 baby after sacrifice, which is very cost-effective.