Mystery Egg's Are always available for purchase. Cost 800 Aurum Each for Growing. Cost 300 Aurum Each for Adult. Common Egg's Are always available for purchase. Cost 600 Aurum Each for Growing. Cost 200 Aurum Each for Adult. Lost Egg's Only 1 of each are available for purchase. Cost 1,000 Aurum Each for Growing. Cost 400 Aurum Each for Adult.