Main article: Ethereal MonstersEthereal Monsters are a class of Monsters found on Ethereal Island and Ethereal Workshop. Each Ethereal is associated with one or more of the following five Ethereal Elements: Plasma (), Shadow (), Mech (), Crystal (), and/or Poison (). The Single-Element ...
as the Single and Double-Element Ethereals already have Rares. It is not known for certain how they would be obtained, however, due to the unique mechanics for obtaining Monsters on Ethereal Workshop.