Who Is Mortarion In Warhammer 40k?

If you’re a fan of the Warhammer 40k universe, then you’ve probably heard of Mortarion. But who exactly is this enigmatic character? Well, buckle up and get ready for a deep dive into the lore of Warhammer 40k as we unravel the mystery of Mortarion, the formidable Primarch of the Death Guard.

Mortarion is a central figure in the Warhammer 40k universe, known for his grim and stoic demeanor. He is one of the twenty Primarchs, genetically engineered superhuman beings created by the Emperor of Mankind. But what sets Mortarion apart is his allegiance to chaos and the dark gods. As the Primarch of the Death Guard, Mortarion and his legion are devoted to spreading disease, decay, and suffering wherever they go. With his scythe, Silence, and his mastery of psychic powers, Mortarion is a force to be reckoned with on the battlefield.

So, whether you’re a die-hard Warhammer 40k fan or just curious about the world of tabletop gaming, join us as we explore the fascinating story of Mortarion and his role in the epic saga of Warhammer 40k. Get ready for a journey filled with battles, betrayals, and the ultimate struggle between light and darkness. Let’s dive into the grim darkness of the 41st millennium and discover the secrets of Mortarion, the Primarch of the Death Guard.

Who is Mortarion in Warhammer 40k?

Who is Mortarion in Warhammer 40k?

Mortarion, also known as the “Death Lord,” is a central character in the Warhammer 40,000 universe. He is a Primarch, one of the genetically-engineered superhuman leaders of the Emperor of Mankind’s Space Marine Legions. Mortarion was the Primarch of the Death Guard Legion, a Legion known for its resilience and endurance in battle.

The Origins of Mortarion

Mortarion’s story begins on the planet Barbarus, a world covered in toxic gases and inhabited by monstrous creatures. Mortarion was born into a life of hardship, leading a band of rebel survivors against the planet’s deadly inhabitants. Eventually, the Emperor of Mankind discovered Barbarus and offered Mortarion and his people a chance to escape their harsh existence. Mortarion accepted, and he and his followers were taken to Terra to be transformed into the superhuman warriors known as Space Marines.

The Death Guard Legion

As the Primarch of the Death Guard, Mortarion led his Legion with an unwavering dedication to the ideals of loyalty and resilience. The Death Guard became known for their unyielding determination in battle and their ability to endure even the harshest conditions. They were often deployed in conflicts that required tenacity and the ability to withstand prolonged sieges. Mortarion himself was a formidable warrior, wielding a massive scythe and clad in ornate power armor.

The Fall to Chaos

Despite their initial loyalty to the Emperor, Mortarion and his Legion eventually fell to the corrupting influence of Chaos. Mortarion was deceived by the Chaos God Nurgle, who promised him power and immortality in exchange for his allegiance. Mortarion and the Death Guard embraced Nurgle’s gifts, becoming plague-ridden warriors who spread disease and decay wherever they went. They became known as the Plague Marines, and their allegiance to Chaos brought them into conflict with the forces of the Imperium.

The Great Crusade and Horus Heresy

During the Great Crusade, Mortarion and the Death Guard fought alongside the other Legions, conquering worlds in the name of the Emperor. However, when the Horus Heresy erupted and Primarchs turned against the Emperor, Mortarion sided with Horus and Chaos. He became one of the Chaos Primarchs, leading his Legion in a brutal campaign against the Imperium.

The Siege of Terra

Mortarion’s ultimate goal was to reach Terra, the seat of the Emperor’s power, and bring about its destruction. He led his forces in a grueling siege, but ultimately failed to breach the defenses of the Imperial Palace. The loyalist Space Marines, led by the Primarch Rogal Dorn, repelled Mortarion’s forces and defended the Emperor. The Siege of Terra marked a turning point in the Horus Heresy, as the forces of Chaos were ultimately defeated.


Following the Horus Heresy, Mortarion and the Death Guard retreated into the Eye of Terror, a chaotic and warp-infested region of space. They continued to serve the Chaos God Nurgle, spreading disease and corruption wherever they went. Mortarion himself became a powerful daemon prince, transformed by Nurgle’s dark blessings. He remains a formidable and feared figure in the Warhammer 40,000 universe, leading his Plague Marines in eternal war against the forces of the Imperium.

The Legacy of Mortarion

Mortarion’s legacy is one of tragedy and corruption. Once a loyal servant of the Emperor, he was seduced by the promises of power and immortality offered by Chaos. His fall to Nurgle and the transformation of the Death Guard into plague-ridden warriors serves as a cautionary tale of the dangers of succumbing to Chaos. Mortarion’s name is synonymous with death and decay, and his presence on the battlefield strikes fear into the hearts of his enemies.

The Primarch’s Return

In recent years, Mortarion has made a dramatic return to the Warhammer 40,000 universe. He has led his Death Guard Legion in a series of devastating campaigns, spreading plague and destruction across the galaxy. Mortarion’s ultimate goal is to bring about the fall of the Imperium and extinguish the light of the Emperor once and for all. His return has sent shockwaves through the galaxy, as the forces of Chaos rally behind their fallen Primarch.


Mortarion, the Death Lord of the Death Guard Legion, is a central figure in the Warhammer 40,000 universe. His story is one of tragedy and corruption, as he went from being a loyal servant of the Emperor to a powerful daemon prince of Chaos. Mortarion’s legacy lives on as he continues to spread disease and decay throughout the galaxy. His return has reignited the fires of war, as the forces of Chaos seek to bring about the fall of the Imperium. The tale of Mortarion serves as a cautionary reminder of the dangers of succumbing to the temptations of Chaos and the devastating consequences that can follow.

Key Takeaways: Who is Mortarion in Warhammer 40k?

  • Mortarion is a character in the Warhammer 40,000 universe.
  • He is one of the Primarchs, genetically engineered superhuman beings.
  • Mortarion is known for his association with the Death Guard, a Chaos Space Marine Legion.
  • He was originally loyal to the Emperor of Mankind but later turned to Chaos.
  • Mortarion wields a massive scythe and is often depicted as a grim and formidable warrior.

Frequently Asked Questions

What is the backstory of Mortarion in Warhammer 40k?

Mortarion is one of the primarchs, superhuman beings created by the Emperor of Mankind during the Great Crusade in the Warhammer 40,000 universe. He was originally found on the desolate planet of Barbarus, where he was raised by a group of scavengers known as the “Death Guard.” Mortarion was eventually discovered by the Emperor, who brought him into the fold of the Space Marine Legions.

As the primarch of the Death Guard Legion, Mortarion led his forces in numerous campaigns, including the infamous Horus Heresy where he ultimately fell to Chaos and became a Daemon Primarch. Mortarion’s backstory is a tale of tragedy and corruption, as he was initially driven by a desire to save humanity but was ultimately consumed by darkness.

What are Mortarion’s abilities and powers?

Mortarion possesses a variety of unique abilities and powers that make him a formidable force on the battlefield. As a Daemon Primarch, he has enhanced strength, endurance, and resilience, allowing him to withstand tremendous amounts of damage. He wields a massive scythe known as Silence, which can cut through even the toughest armor.

In addition to his physical prowess, Mortarion is also a powerful psyker, capable of manipulating psychic energies to devastating effect. He can summon plagues and diseases, spreading death and decay among his enemies. Mortarion’s abilities make him a deadly opponent, capable of both close combat and long-range attacks.

How does Mortarion fit into the lore of Warhammer 40k?

Mortarion is an integral part of the lore of Warhammer 40,000, particularly during the Horus Heresy. His fall to Chaos and transformation into a Daemon Primarch is a significant event in the history of the Imperium. Mortarion’s Legion, the Death Guard, has become synonymous with disease and decay, serving as a constant threat to the forces of the Imperium.

Throughout the lore, Mortarion’s presence is often felt in battles and campaigns, as his influence extends beyond the physical realm. He is a figure of fear and despair, representing the darker side of the Warhammer 40,000 universe.

What are some notable battles or campaigns involving Mortarion?

Mortarion has been involved in numerous battles and campaigns throughout the history of Warhammer 40,000. One of the most significant events in which he played a major role is the Horus Heresy. Mortarion and his Death Guard Legion sided with the traitor Warmaster Horus, leading to a brutal civil war within the Imperium.

Another notable campaign involving Mortarion is the Plague Wars, where he led his Death Guard forces in a massive assault on the Imperium’s Ultramar sector. This campaign saw the spread of Mortarion’s plagues and diseases, causing widespread devastation and death.

Is there any ongoing storyline involving Mortarion in Warhammer 40k?

Yes, there are ongoing storylines involving Mortarion in the current Warhammer 40,000 setting. The events of the Gathering Storm and the subsequent Dark Imperium storyline have seen Mortarion and the Death Guard launch a massive invasion of the Imperium, spreading death and corruption in their wake.

Mortarion’s ongoing storyline is a testament to his enduring presence in the Warhammer 40,000 universe, as he continues to be a major player in the ongoing conflicts and struggles within the Imperium.

Who is Mortarion in Warhammer 40k? 2

Mortarion And The Deathguard EXPLAINED By An Australian | Warhammer 40k Lore

Final Summary: Unveiling the Mysterious Mortarion

As we conclude our exploration into the depths of Warhammer 40k, we cannot overlook the enigmatic figure of Mortarion. This iconic character has captivated fans and players alike with his dark and brooding presence. From his origins as a Primarch to his transformation into a Daemon Prince, Mortarion’s story is one of tragedy, despair, and ultimate power.

Throughout our journey, we have witnessed Mortarion’s rise as the primarch of the Death Guard Legion, his embrace of Nurgle, the Chaos God of Decay, and his eventual ascension to daemonhood. His character embodies the grim darkness of the Warhammer 40k universe, adding a layer of complexity and darkness to the already rich lore.

Mortarion’s story serves as a reminder of the horrors and sacrifices that can befall even the mightiest of beings. His journey is a cautionary tale of the dangers of succumbing to darkness and relinquishing one’s humanity. Whether you view him as a tragic hero or a malevolent force, there is no denying the impact Mortarion has had on the Warhammer 40k narrative.

In conclusion, Mortarion’s presence in Warhammer 40k is a testament to the depth and intricacy of the lore. His character adds a touch of darkness and complexity to the already expansive universe, captivating fans and players alike. Whether you choose to command him on the battlefield or simply admire his tragic tale, Mortarion will forever remain an icon in the Warhammer 40k universe.

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