Motif · Book 4, The Gate of the Feral Gods
The soul crystal
An F-quality soul crystal on a walnut necklace, metering power to the balloon that holds a house up, 'Kill something to charge it up'; kept a fraction open. The C-quality one in Carl's inventory is still a bomb.
Segment appearances
Progression
Handed over by a child (ch. 17); kept a fraction open so the house neither sinks nor flies.