Editing Shattered Sun (section)

=====''The Enemy Within''=====
Though They are largely united for Their survival, there is one issue which divides Them - the practice of sacrifice. Those in the core of Their civilization are very willing to give Their own blood to the Soulshards as there are more of Them concentrated there. Besides, Their blood is far more pure for the Soulshards' needs and indeed grow the Shards' power much better than that of outsiders. For the communities on the fringe however, Their relatively scant numbers limit their ability to feed their own blood into Their Soulshards. They have to resort for hunting for others to sacrifice to Their Shards, which in turn slows down Their progress compared to those in the core.

The disparity between the core and the fringe, as well as the factors above ground, force Them to bide Their time before launching Their assault on the surface. The quandary thus becomes as follows: bide too little time, and They will become too weak to succeed above; bide too much time and They may die off before They can get the chance to attack. They must figure out how much time They need to take before launching the offensive, especially before the Enemy Above catches wind of Their plans.