Explorers at first wondered how monsters procreated. Soon they discovered a monumental cavern surrounded by flowery flora and fantastical fauna where monsters lovingly produced their eggs. Animal enthusiast Lawrence Edgar Elliott transformed this into the Breeding Den, allowing monsters to be observed, or matched, to produce unusual and exotic hybrids.
|Element||Incompatible with||Element||Incompatible with|
The order of the monsters in the Breeding Den is determined by the age of the habitat that they are in (i.e. in the order of the habitats that were built). The monsters in the oldest constructed habitat will appear at the top of the list while those monsters in the newest habitat will appear at the bottom. The order of the monsters within a given habitat is then determined by their level (highest appears on the list first) and the order in which they were moved into that habitat (more recent appears on the list first).
- The Breeding Den is an original building from the initial release.
|Breeding Den||Dream Room||Hall of Champions|
|Large Farm||Mythic Cave||Nursery|
|Premium Farm||Small Farm|