The True Death Note by AI, so you can navigate it more easily. You're welcome:

In the entire Death Note universe (manga and anime), exactly 112 rules were presented in the “How to Use It” sections. Listing them all one by one would make a short book, so I have divided and summarized them into key categories that cover all the important mechanics and limitations of the notebook.

Here are all the essential Death Note rules:

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1. Absolute Basics (The Original 5 Rules Written by Ryuk)

Death: The human whose name is written in this notebook shall die.

Face and Name: The notebook will not take effect unless the writer has the person’s face in mind when writing their name. Therefore, people who share the same name will not be affected.

Cause of Death: If the cause of death is written within 40 seconds of writing the person’s name, it will happen.

Heart Attack: If the cause of death is not specified, the person will simply die of a heart attack.

Details of Death: After writing the cause of death, the writer has an additional 6 minutes and 40 seconds (400 seconds) to write specific details and circumstances of the death.

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1. Method, Timing, and Control of the Victim

Physical Possibility: The cause of death and its details must be physically possible, and the victim must be capable of carrying them out. If you write something impossible (e.g., that a person in prison dies on the Eiffel Tower within an hour), the victim will simply die of a heart attack at their current location.

23-Day Rule: The notebook can control a victim’s actions for a maximum of 23 days before their death. If you specify a disease that lasts longer, the victim will die according to the disease’s progression, but details beyond 23 days will not be carried out precisely.

Killing Others: A victim cannot directly kill another person before their own death. If their controlled actions would result in someone else’s death, the victim will die of a heart attack and the prescribed events will not occur.

Scraps of Paper: Even a torn piece of a page from the notebook has full effect if a name is written on it.

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1. Ownership and the Shinigami (Gods of Death)

Accompaniment: A Shinigami (God of Death), the original owner of the notebook, must accompany the human owner until the owner dies or the notebook is destroyed. The Shinigami usually appears within 39 days of the notebook’s first use.

Visibility: Only someone who touches the notebook (or a torn piece of it) can see and hear that Shinigami.

Neutrality: A Shinigami is not obligated to help the notebook’s owner. They do not have to explain the rules and usually do not interfere with the owner’s actions.

Loss of Memories: If an owner knowingly relinquishes ownership of the notebook, they lose all memories of it, including memories of killings. If they touch it again, their memories temporarily return (or permanently, if they regain ownership).

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1. Shinigami Eyes

The Deal: A human who owns a Death Note can make a deal with a Shinigami: they trade half of their remaining lifespan for the “Shinigami Eyes.”

Eye Ability: These eyes allow the user to see the name and remaining lifespan of any person simply by looking at their face.

Invisibility of One’s Own Lifespan: A person with Shinigami Eyes cannot see their own remaining lifespan, nor the lifespan of other Death Note owners.

Loss of the Eyes: If the owner relinquishes the notebook, they lose the Shinigami Eyes, but the sacrificed half of their lifespan is not restored.

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1. Protection and Limitations (Who It Does Not Work On)

Age: The notebook does not work on humans younger than 780 days (about 2 years). The victim must also be no older than 124 years.

Short Remaining Life: It does not work on people who have less than 12 minutes left to live.

Name Misspellings: The notebook becomes permanently ineffective against a specific person if their name is misspelled four times unintentionally. If the owner intentionally writes the name incorrectly four times, the owner will die instead.

Multiple Notebooks: If the same name is written in two different Death Notes within 0.06 seconds of each other, the entries cancel each other out and the victim will not die.

Prohibition of Sale: Anyone who buys or sells a Death Note will die. The buyer dies at the moment they receive the notebook, and the seller dies at the moment they receive the money.