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Exploring the 10 Biggest Mysteries of the Warhammer 40k Universe

The Warhammer 40,000 universe is a vast and complex setting, filled with numerous mysteries and unknowns. These mysteries range from the origins of powerful beings to the true motivations of secretive organizations. Here are the top ten mysteries in the Warhammer 40,000 universe, along with a more detailed explanation of each one.


10) The Black cells

In the Warhammer 40,000 universe, the Black Cells are a secret organization of the Inquisition that operates outside the normal channels of Imperial authority.

The Black Cells are responsible for carrying out the most extreme and dangerous missions, often involving the use of forbidden technology, psychic powers, or even the sacrifice of innocent lives.

The Black Cells are made up of a small group of highly trained and skilled individuals, each of whom has been handpicked for their abilities and loyalty to the Imperium. They operate independently of the other branches of the Inquisition and answer only to the highest levels of Imperial command.


9) The Dark Angles

The Dark Angels are one of the oldest and most powerful Space Marine chapters, but their true allegiance is a matter of debate.

Some believe that they are loyal to the Emperor and the Imperium, while others suspect that they have their own secret agenda. The Dark Angels are known for their secrecy and their willingness to go to any lengths to protect their secrets.

Now with the return of their primarch leader and gene father Lion El’Jonson, only time will tell where their loyalties to still lie….with The imperium or themselves and their own agenda.


8) The Old ones

The Old Ones were an ancient and highly advanced race that played a key role in the formation of the galaxy as it is known today. According to the lore, the Old Ones were responsible for creating the Warp, the Immaterium, and the very fabric of reality itself.

The Old Ones were a highly intelligent and powerful race that possessed advanced technology and psychic abilities. They were able to create entire ecosystems and even sentient life forms with their advanced biotechnology, and are credited with having created many of the intelligent races that populate the galaxy today, including the Eldar, Orks, and Necrons.


7) The Black Library

The Black Library is a repository of forbidden knowledge located in the Warp. It is guarded by the enigmatic Harlequins, and its secrets are known only to a select few.

Some believe that it contains information on the origins of the universe, while others think that it holds the key to unlocking ultimate power.


6) The C’tan

The C’tan are a race of powerful and malevolent star-gods that were created by the ancient and highly advanced race known as the Old Ones. The C’tan are beings of pure energy that feed on the life force of other beings, and are capable of manipulating reality itself.

The C’tan were originally created by the Old Ones as weapons against their enemies, and were imbued with incredible power and intelligence. However, the C’tan eventually turned on their creators and began to consume their life force, leading to the downfall of the Old Ones.

After the fall of the Old Ones, the C’tan were left to roam the galaxy freely, consuming the life force of other beings and growing in power. They were eventually imprisoned by the Necrons, a race of robotic beings who were created by the C’tan to serve as their slaves.


5) The missing Primarchs

The Primarchs were the twenty genetically-engineered sons of the Emperor, but two of them were mysteriously lost during the Great Crusade.

The circumstances surrounding their disappearance remain unknown, and their fates have become the subject of much speculation and rumor. Some believe that they were killed in battle, while others think that they turned against the Imperium and joined forces with the forces of Chaos.


4)The Origins of the Emperor

The Emperor of Mankind is one of the most powerful beings in the galaxy, but his origins remain shrouded in mystery. Some believe that he is a genetically-engineered superhuman, while others speculate that he is a reincarnation of a powerful psyker.

The Emperor was instrumental in the creation of the Imperium and the Great Crusade, but his true motivations and ultimate goals remain unknown.


5) The Watchers

The Watchers in the Dark are a mysterious, humanoid race of small stature that reside within the mobile fortress-monastery of the Dark Angels Space Marine Chapter known as The Rock. They are often utilized by the chapter and its Unforgiven Successor Chapters as favored servants.

Despite their usual silence and small stature, Watchers are intelligent creatures who psychically communicate with one another. They have been seeking to guide the Dark Angels against Chaos since before the Horus Heresy, and are acquainted with the likes of Eldrad Ulthran. It is still a mystery what exactly they are, but some believe that they are some sort of higher-dimensional being.


4) The Cabal

The Cabal is a secretive organization that operates behind the scenes, and they have been known to manipulate events and individuals to achieve their goals. They have been shown to have advanced technology and psychic abilities, and are capable of influencing the outcomes of battles and wars.

The true nature and motives of the Cabal are not fully understood, and they remain a mysterious and enigmatic faction within the Warhammer 40k universe. Some fans have speculated that they may have ties to the Old Ones, an ancient and powerful race that created the Eldar and other intelligent species in the galaxy. Others believe that the Cabal may be working towards their own self-interests, and that their claims of fighting for humanity’s survival may be a ruse.


3) The House Delaque

The origins of House Delaque are muddled in rumor and hearsay. Some tales speculate they are xenos wearing human skin, while others argue they are the result of genetic experimentation.

Perhaps strangest of all is the tale of the Drowned Empire, which claims they came to Necromunda in ages past when the world still possessed oceans. Living amongst the seas and aquatic gods for many years, these “fishy” men eventually found that the oceans were beginning to dry up. Being cleverer than most, Delaque built a new sea for themselves and their gods close to the center of the world.

Another story goes on to say that hundreds of years ago there was a great plague across Necromunda that infected people’s dreams. The afflicted came from all houses and standing of Necromunda society, and they all gathered in the Underhive for some unknown reason.


2) The Emperors Map

“I can not feel fear, but if I ever knew the time to feel it, it was then ” – A Space Marine of the lunar wolves

The Lunar Wolves, accompanied by the Emperor himself, were tasked with searching a dead world they came across thousands of light years from Terra. One that once supported life of a dead civilization, leaving behind a catacomb of sub-terrain habitats and the lunar wolves were tasked with searching them.

Only finding one thing of note….10km deep inside a stone vault, there was a giant map, 20 meters across….a map of a world the space marines didn’t recognize, only recognizable to The Emperor himself and giving even him chills.

It was a map of Holy Terra itself, with the oceans, mountains, and shorelines that existed long ago all in perfect detail, before the rise of the Hive cities and the destruction of war, many mysteries were left inside that vault.


1) The Watcher in the Rain

The Watcher in the Rain is a mysterious and insidious warp entity. It appears as an ever-present, shadowy figure at the edges of one’s vision, haunting those guilty of evil deeds, known to whisper in its victim’s ear……..” will you see me, I am right here “

His first known appearance is on the Imperium Administratum world of K4, when a nearby warpstorm appeared and threatened to engulf the planet. With the storm’s approach came intense and unending rainstorms threatening to drown the planet’s cities.

Over the course of a year, it stalked a data scribe named Greta Vern, as well as Imperial interrogator Stefan Crucius. It also made itself known to a cult of mad asylum-dwellers who revered it as their deity. Despite the scribe and interrogator’s escape from the planet, the Watcher followed them aboard their shuttle and set its eye on the crew of an approaching Imperial Navy vessel.