The exact probabilities for Ancient Egg are unknown. Some results: Age 1: 5/5 One of Many Age 3: 2/2 Matriarch Age 4: 6/6 Infected Pack Leader, 10/10 One of Many, 11/11 Matriarch Age 5: 20/20 One of Many, 2/2 Matriarch, 13/13 Pack Leader Age 6: 18/18 One of Many, 11/11 Killaroo, 15/15 Killaroo, 22/22 Killaroo, 3/3 Matriarch, 19/19 Infected Pack Leader, 21/21 Pack Leader Age 10: 15/15 Hunted Dragon Age 11: 41/41 Pack Leader Age 25: 29/29 Pack Leader Age 15: 44/44 Matriarch Age 52: 170/170 Kilaroo Age 55: 280/280 One of Many