
In Warhammer 40k, the Butcher's Nails are implants in the head of the Primarch Angron. They are a form of psycho-surgery, resembling a lobotomy, that amplifies the anger and rage of the subject. The Nails replaced large portions of Angron's brain, including his limbic lobe and insular cortex, and are the only thing keeping him alive. Therefore, the Nails cannot be removed without killing Angron.
| Characteristics | Values |
|---|---|
| Can the Butcher's Nails be removed? | Yes, according to some sources, but it would result in death. |
| Why can't they be removed? | They are deep in the head and spine, and they replace large portions of the brain, including the limbic lobe and insular cortex. |
| Who has them? | Angron, Primarch of Nuceria |
| What are the Butcher's Nails? | A form of psycho-surgery, similar to a lobotomy, where large amounts of nails trailed with cables are inserted through the skull and into the brain to amplify anger and rage. |
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What You'll Learn

Angron didn't want them removed
In the Warhammer universe, the Primarch Angron had surgical implants in his head known as the Butcher's Nails. These implants were forced upon him when he was young. While it was technically possible to remove them, Angron did not want them removed.
In the book "Galaxy in Flames", it is said that Angron never wanted the Butcher's Nails to be removed, despite the technology to do so existing. However, in the audio drama "Butcher's Nails", Lorgar says to Angron, "They cannot be removed. Not without killing you. I had no intention of trying. If it is possible for us to die, you will do so with those wretched things inside your skull." This suggests that Angron's survival was prioritized over the removal of the Butcher's Nails.
In the lore, it is explained that the Butcher's Nails replaced Angron's ability to enjoy anything but anger. The Emperor, who was beloved by all, ordered the removal of the Butcher's Nails, but it was concluded that the nails had advanced too deep into Angron's brain and that attempting to remove them would result in his death. As a result, Angron was left with the implants, and his anger remained.
Some sources suggest that the Emperor's decision not to remove the Butcher's Nails may have been motivated by his desire to keep Angron as a berserker or because he believed that an angry Angron was better than no Angron at all. Additionally, the World Eaters were still effective in their campaigns, and removing the Butcher's Nails would have left them without a primarch.
Despite the risks, some fans have theorized that with advanced medical technology, it may have been possible to remove the Butcher's Nails without killing Angron. In one alternate universe scenario, a Primarch successfully removes the Butcher's Nail from Angron's brain, freeing him from his enslavement to anger.
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They replaced parts of his brain
The Butcher's Nails are a form of psycho-surgery, bearing resemblance to a lobotomy. The procedure involves inserting large amounts of nails trailed with cables through the skull and into the brain to amplify the anger and rage of the subject.
In the Warhammer Horus Heresy, the Primarch Angron had these implants placed in his head as a child. The Nails replaced parts of Angron's brain, including his limbic lobe and insular cortex. This allowed him to live, but it also meant that the Nails could not be removed without killing him. The Emperor conceded that the Nails could not be removed without causing Angron's death, and even if they were removed, Angron would likely die anyway due to his condition.
The Nails were hazardous to psykers, and most of them tried to have them removed. The procedure to remove the Nails had a 100% mortality rate, as it involved ripping out large portions of the brain and spinal column along with the Nails.
In the Audio Drama 'Butcher's Nails', Lorgar says to Angron, "They cannot be removed. Not without killing you. I had no intention of trying. If it is possible for us to die, you will do so with those wretched things inside your skull." This suggests that the Nails were keeping Angron alive, and their removal would result in his death.
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They were deeply embedded in his head and spine
The Butcher's Nails are implants forced into the head of the Primarch Angron in his youth. They are described as large amounts of nails trailed with cables resembling dreadlocks. These nails are deeply embedded in Angron's head and spine, and they replaced his limbic lobe and insular cortex, which are important parts of the brain.
The Nails were created to remove the ability to experience any emotion other than anger. They are so deeply embedded in Angron's head and spine that removing them would result in death. In the book "Galaxy in Flames", it is said that Angron never wanted them removed, but other sources suggest that the Nails are the only thing keeping Angron alive, and removing them would kill him.
In the Audio Drama "Butcher's Nails", Lorgar says to Angron, "They cannot be removed. Not without killing you. I had no intention of trying. If it is possible for us to die, you will do so with those wretched things inside your skull." This sentiment is echoed by other characters in the story, who believe that removing the Nails would result in Angron's death.
The Nails are described as a form of Archaeotech, a complex and sophisticated form of technology. Despite this, none of the Emperor's best Tech-Priests could find a way to remove them without killing Angron. The Nails are also said to be some form of Dark Age tech, which may explain why they are so difficult to remove.
In summary, the Butcher's Nails are deeply embedded in Angron's head and spine, having replaced important parts of his brain. Removing them would likely result in death, and so even the Emperor's most skilled technicians were unable to find a way to do so safely.
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Removing them would have a 100% mortality rate
The Butcher's Nails are a form of psycho-surgery conducted on the world of Nuceria, the adopted homeworld of Angron. The procedure involves inserting large amounts of nails trailed with cables through the skull and into the brain to amplify the anger and rage of the subject. These implants were forced upon Angron in his youth.
The Nails cannot be removed without incurring a 100% mortality rate because they are deeply embedded in Angron's head and spine, and they have replaced some important parts of his brain, including his limbic lobe and insular cortex, allowing him to live. In the audio drama 'Butcher's Nails', Lorgar says to Angron, "They cannot be removed. Not without killing you. I had no intention of trying. If it is possible for us to die, you will do so with those wretched things inside your skull."
The Emperor, a character in the Warhammer 40k universe, explains that the Butcher's Nails were recreated to remove the ability to enjoy anything but anger. When asked if he could remove them, he admits that it is possible, but the tendrils are deeply embedded in Angron's head and spine, and removing them would result in certain death.
In the novel 'Master of Mankind' by Aaron Dembski-Bowden, the character Arkhan Land realizes that the Nails are the only thing keeping Angron alive, which is why they cannot be removed without killing him. This is further supported by the character Malcador in 'First Lord of the Imperium', who suggests that the Nails cannot be removed because they are some sort of Dark Age tech that has overcome the Primarch's body's ability to repair.
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They were the only thing keeping Angron alive
The Butcher's Nails are a form of psycho-surgery conducted on the world of Nuceria, Angron's adopted homeworld. The procedure involves inserting large amounts of nails trailed with cables through the skull and into the brain to amplify the anger and rage of the subject. These implants were forced upon Angron in his youth.
The Nails replaced parts of Angron's brain, including his limbic lobe and insular cortex, allowing him to live. They were the only thing keeping Angron alive, and their removal would result in certain death. In the audio drama 'Butcher's Nails', Lorgar says to Angron, "They cannot be removed. Not without killing you. I had no intention of trying. If it is possible for us to die, you will do so with those wretched things inside your skull."
The Emperor, who examined Angron's Nails, conceded that they could not be removed without killing him. He believed that the Nails led to Angron's instability and removed his ability to enjoy anything but anger. Despite having the technology to remove them, the procedure would have a 100% mortality rate.
The Nails were hazardous to psykers, and most of them tried to have them removed. The regular version of the Nails could be removed, but the original, more complex and powerful version implanted in Angron's head could not be removed, even by the Emperor.
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Frequently asked questions
The Butcher's Nails are psycho-surgical implants that replace large parts of the subject's brain, including the limbic lobe and insular cortex. Removing them would result in death.
The Butcher's Nails were implanted into Angron, a Primarch in Warhammer 40k.
The Butcher's Nails amplify the subject's anger and rage by reducing serotonin production and deadening emotional responses.











































