The energy is also sensitive to the human psyche, as the colonists discovered to their dismay. The Fae reacts to human cerebral activity, bringing to life dreams and manifesting fears. In fact, many of the first colonists were killed by Fae-constructs, demons and beasts that fed off of their human progenitors, both physically and mentally. It was only by a Great Sacrifice, the loss of all the technology and knowledge the colonists had brought with them, that humanity came to terms with the Fae, at least enough to learn a rudimentary level of control over the power.