From the back of the book:
Darkun Origins/Darkun Rites
Darkun Subfactions and their Interaction (including a complete interaction chart)
Darkun Tattoos and Symbols
Darkun Units (Battle Group, Death Commando, Tarbath, Vandrak, Decoy, Slayer etc.)
New Player Character Races: Rlisha and Centaurs
New Classes: Companions, Servants and Darkun Subclasses
New Aptitudes (including a complete set of the new Player Character Sheets)
New Combat Rules: Hand-2-Hand Combination Attacks
New Darkun Weapons (Cobra Fang, Scorpion Sting, Shard Blade, Staff of Pain etc.)
Additional Poison Rules
New Darkun Magic: Spells (Temple Wrath, Darkun Bloodpact etc.) and Magic Objects (Tarbath Rally Horn, Death Mask etc.)
Cults: Code, Orders and Developing new Factions/Subfactions
Mental Health: Indoctrination effects on Sanity/Nightmare Effects on Spell casters
6 New Creatures (Temple Blade, Darkun Berserker, Temple Pillar Elemental etc.) with complete detailed Creature Character Sheets.
Master of Tales (MT) Section: how to roleplay Darkuns.
Fire Temple of Morg Game Aid (Maps, Temple Structure etc.)
2 Complete Scenarios Forming the Basis of a Campaign Setting.