Ethereals

The single-Element Ethereal Monsters are bred on the Natural Islands - each island has its Ethereal - but they cannot breed nor produce Shards while there. They only show their full abilities if they are teleported to their home world, Ethereal Island, after being fed to Level 15.

Each single-element Ethereal is bred by using a Quad-element Monster and a Triple Element Monster. There is a very low chance of success. More than 90% of the time, the breeding result will be a Triple Element Monster of the same type as the parent.

Double-element Ethereals are only breedable on Ethereal Island, with no guarantee of success, even when using two single-element parents.

Rarethereals

 * Main article: Rarethereals

Rare Ethereal Monsters are called Rarethereals, and can be bred on both Natural Islands (For Single Element Ethereals) and Ethereal Island (Both Single and Double Element Ethereals).

Feeding Monsters
Each Monster needs to be fed four times before it reaches the next level. Increasing the Monster's level increases the Coins/Shards earned per minute/hour, as well as the maximum Coins/Shards earned.