Crowfall вики

"Thralls are the souls of fallen warriors and craftsmen, the spirits who remain on the Dying Worlds after the living have fled before the Hunger. They are ghosts and spirits, haunting these Worlds in the final hours…"

Soul Gems exist for the Eternal Heroes to harvest the Thralls of NPCs that they encounter in the dying worlds. The thralls will be used to incarnate NPCs as craftsmen/shopkeepers or to imbue equipment with bonus attributes and abilities.

Only a few examples of Thralls have been mentioned they are listed below: Dwarven Blacksmith Thrall
Elven Blademaster Thrall