Essence being harvested by one of the Seeing.

Essence in the energy that permeates dimensions and links them together, and it is through sensitivity to the Essence that the Seeing are able to perceive realities other than Earth, such as Lusst'ghaa.

Essence is a tangible energy in Lusst'ghaa, and powerful Seeing (level 3s) can harvest it, holding it within their bodies, and then use it to affect the lifeforms and technology of that realm.

Among the uses for Essence is the powering of obelisks that are located throughout Lusst'ghaa.