Eggs

Each monster's egg, called spores in the files, is uniquely identifiable, even before the egg hatches. Since each monster in the game is also made from a unique combination of elements, these eggs also represent the 'genetic material' of the two parents shown at the top of the breeding structure. Kayna initially did not have an egg; its egg was added in Update 2.2.4.

All Rare monsters and Epic monsters have the same eggs as their non-Rare/non-Epic counterparts, except that a shimmer or gleam effect will appear across the egg from left to right in Breeding Structures and Nurseries.