As Melinoe endlessly travels through the world of Hades 2, she will find dozens of materials for rituals and incantations, but finding Plasma can be especially time-consuming. Having a round shape and emitting mysterious energy, this material has a high price and great potential for getting incantations requiring formlessness and change. But, if you run through any of the main game locations, you will not be able to find a single unit of this material.