Book of Shadows

This book is not to be read... 
It contains the most horrific beast in the Nether..
I repeat, do not read.
====Demonic hound====
Minor demon. Made of pure fel energies.
Seemingly related to the Core hounds of Azeroth.
Seems that Fel energies attract them.
====Beholder====
Monstrous creatures found in Outland.
They feature two rows of teeth and seven eyes. Floating eyes are demons in service to the Burning Legion, and appear to be intelligent.
Eyes are the first demonic species that have been shown to have offspring. Young floating eyes possess only one eye, with far fewer teeth. They are also far less aggressive then their adult counterparts.
====Abyssal====
Demonic constructs similar to infernals, but made from rougher, more jagged material, and burn with a red flame instead of a green one.
====Shivarra====
6-armed female mystical demon species living in Outland, averaging at roughly twenty to thirty feet tall.
Shivarra serve the Burning Legion as priestesses and military chaplains. They are devout and charismatic and as such are a driving force behind the Burning Legion as all their efforts are bent on bringing Sargeras' vision into being.
====Imp====
The imps are a mischievous and nefarious race of small, fiendish creatures. They are granted to the Legion's warlocks as familiars. Although their frames are tiny, they are able to store tremendous amounts of fel energy.
====Voidwalker====
Demons created from the chaos of the Twisting Nether. Their touch is misery, and it can momentarily blind a creature's awareness to other threats. These hulking blue creatures look vaguely humanoid. It seems to appear from within a black cloud as dark as the void.
====Sayaad====
A succubus is a stunningly beautiful woman. Her voluptuous form is squeezed into a tight leather bodice. Large bat wings unfurl from her back, and she lets out a short gasp as she cracks a small whip against her milky thigh. A succubus is pleasure and pain rolled into one deadly package. Like all demons, she enjoys bringing death and misery to the mortal races — but that doesn’t mean she can’t have fun with them first.
====Infernal====
Mindless giants of flame and fury and can be summoned by warlocks and the nathrezim. They are not truly demons, apparently more similar to constructs.
Crafted by the tothrezim, infernals fall to earth as green, molten meteorites from the Twisting Nether. They exist only to destroy every living thing in their path. Though their lifespans are limited, the mighty infernals have been known to destroy entire cities before their energies dissipated back into the Great Dark Beyond.
====Void Terror====
A void terror is a huge and extremely powerful two-headed demon. This beast possess a nearly unlimited source of demonic energy.
====Ered'ruin====
When mortals recall the brutal terror of the Burning Legion’s armies, they would likely think first of the doomguard.
The fearsome doomguard once served as Archimonde's personal escorts. Although they were often called upon to perform a number of duties for the Legion, their loyalties lay with him alone.
====Nathrezim====
Intelligent and cunning demons who were discovered and recruited to the ranks of the Burning Legion by Sargeras, the dark titan. "The mysterious beings of the Burning Legion called the dreadlords are also known racially as the Nathrezim. Little is known of their homeworld and even that is rumor. They act as tacticians and lieutenants upon the field of battle in time of war, as well as being emissaries and agents for the fiery lords of the Legion.
They are known to be extremely manipulative and masters of trickery; they are thal'kituun, the unseen ones.
====Annihilan====
Born from the sheer hatred of the Nether, the Annihilan are a powerful species of demons recruited by Archimonde the Defiler to serve the Burning Legion.
The annihilan pit lords are described as engines of destruction. They are driven by pure rage and bloodlust. Their bodies resemble massive lizards, with six powerful limbs,a tail, and wings sprouting from their backs.
====Fel Stalker====
Fel stalkers are the hunting hounds of the pit lords, starving both for blood and for arcane energy. The corner of the Twisting Nether that spawned them is a void, drained of magic and substance and filled with drifting corpses.
====Felguard====
While most other demons rely to some extent on magic and trickery, felguard eschew these subtleties, instead relying on sheer strength to overwhelm their foes. While under the command of a higher-ranking demon or a warlock, a felguard makes the perfect soldier. Each is a disciplined follower outside of combat, calm and patient. When commanded to fight however; they become wild and merciless, an army of raging felguard is a terrifying sight.
====Mo'arg====
The mo'arg are a demonic species within the ranks of the Burning Legion. Tall and broad in stature, they are particularly proficient in hand-to-hand combat. Many mo'arg are tinkerers, scientists, blacksmiths, and engineers among the ranks of the Legion and have "improved" their own bodies with bionic parts. Some have gone so far with their enhancements that they resemble the abominations of the Scourge, with the only difference with their undead counterparts being that they are actually very clever.
====Man'ari Eredar====
The man'ari are the demon-corrupted eredar who now lead the Burning Legion. They are commonly referred to as just the eredar, this could be due to the fact that, other than the draenei and man'ari, there is not any evidence of other kinds of eredar left in existence. This eredar are the first among the demons of the Burning Legion.