Purplharp

"???" Elements: Plasma, Crystal, Poison, Spectral

This monster can be bred with two Double Elements.

Sox + Googlug

Plasbot + Fung Pray

Jellbilly + Flutehog

However, it can be bred with a Single Element and a Triple Element.

Jirobeat + Ghazt

Plantra + Jeeode

Octopiano + Humbug

Stegohorn + Spectgon