Eggs
Eggs from Monsters Bred by The Player
Wild Eggs
Eggs can also be found out in the wild in any Tamer Pack location. They are indicated by a light green nest containing shaking red-spotted egg at it's centre. Once collected, the egg will be put in one of the available incubators in the eggs section of the player's menu.
Sometimes when trying to pick up a wild egg, you will be attacked by the egg's angered mother! She cannot be tamed using a pact, and so you must defeat her in order to obtain her egg. Although this stops you from picking the egg up immediately, this battle enables you to see what species the monster egg will be of before you even collect it!