Whenever Eihort encounters a human, it makes a bargain with them. If the human declines, Eihort kills the human. If the human accepts, Eihort implants a undeveloped brood into their body. When the brood hatches it will kill the human host. According to The Revelations of Gla'aki, after the fall of humanity, Eihort's brood will be born into light and replace humanity.