Dominus Ovum

The Dominus Ovum it's an egg in the Cave.
How to find it: You have to collect the Dominus that is on the road outside the City, and the White Plastic Egg that is on the other side of Mainland next to the Forest and the Volcano. In the end you will have to go to the Cave and press the button on the machine and you will have the egg. (Note: the 2 objects will disappear in case you want another person to grab the egg).