Tierii: Understanding Our Greatest Threat

== General Overview ==
"Tierii: Understanding Our Greatest Threat" is a popular new book published by the accomplished scholar Newtish Riggleby. After spending several months in Galken and a few weeks on the front lines of Betrayer's Isle, Newtish collected a vast amount of arcane knowledge about the undead into one large comprehensive tome. 
While widely accepted among most learned circles as the most prominent source of knowledge relating to Tierii, some debate the weight of the points the book suggest as it does suggest the nature of all Tierii is to consume life and spread death.
== Introduction ==
Before we get started I would like to address the term, "Tierii," in its completion. The connotation of the suffix Rii implies that a Tierii has a living essence inside them that binds them to this world and are creations of the Goddess Alilia. However, this is quite the opposite. The defining characteristic of Tierii is that the creatures lack a self-sustaining Rii, or rather living essence. They have neither a Rii nor are they creations of Alilia.
Now make no mistake, Tierii are very much alive. A Rii is fuel for the body, but any body can sustain itself for a little longer than a week without essence.
The term Tierii actually comes from Ficktier the second destroyer. Tierii are results of his actions of ripping the Rii out of a living individual. Therefore, "Tierii" is a slang term that combines "Tier" from Ficktier, and "Rii" to denote sentience. Tierii has become the widely accepted term when referencing these creatures, however, I feel the more appropriate term when referencing them in common tongue is dullspawn. 
Dull references the lack of a sustaining Rii, and spawn references the creatures sentience. There are many different classifications of dullspawn but the main two categories that can define dullspawn are intelligent and primal.
Depending on how someone's Rii is taken and how long the body has been without essence the mind reverts to a primal state attempting to consume anything it can to survive. We call these dullspawn: primals. Gorgers (Zombies) and hunters tend to fall in this category 
On the other end of the spectrum are the intelligent dullspawn. Intelligent dullspawn maintain heightened thinking. Vampires and wraiths tend to fall in this category. Because of their intelligence, these dullspawns are often able to consume Rii's in their most pure forms.
An intelligent dullspawn can always slip and become primal if they do not consume essence when their body requires it. A primal dullspawn can become intelligent if it consumes essence quick enough. Although the longer a dullspawn remains primal the more difficult it becomes to revert it back to its intelligence.
Every living thing has a rii or some form of self sustaining soul that allows it to live on Ilderon. Dullspawn have lost that energy and therefore must consume it from other sources.