

Let's say, Bob has a death note. He gives up ownership, so that another one
with shinigami eyes can tell him his lifespan. Bob is a genius, so he can
calculate his death date. He writes his own name in it.

Bob Hyrule, Bradykardie, 2.3.2034.

He set his death date, by killing himself with a disease. Now he makes the
shinigami eye deal. Will he die earlier?


CC BY-SA 3.0
2015-03-21T16:05:03.993
20221
2015-04-22T23:05:28.423
6399
question
death-note
Can a person do the shinigami eye deal without losing half of his lifespan?


This will not work due to the 23 day rule.

> ## [How to use
> XXVII](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_XXVII)
>
>   2. If you write, die of disease for the cause of death, but only write a
> specific time of death without the actual name of disease, the human will
> die from an adequate disease. But the Death Note can only operate within 23
> days (in the human calendar). This is called the 23 day rule.
>

Now lets say the person's lifespan will end in 23 days or less. Then the
question could be rephrased as _What would happen to a person whose name is
written in a DN, but whose lifespan is recalculated to be before the date
written in that DN?_ This could be caused by both the shinigami deal or by
indirect influence of other people's deaths by DN. In this case we would again
end up at the situation where a person's lifespan is before the date set in
the death note and as we know from [this
answer](https://anime.stackexchange.com/a/909/6166), it is impossible to
_increase your lifespan by killing yourself with the death note._

## [How to use
VLII](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_LVII)

>   1. In the Death Note, you cannot set the death date longer than the
> victim's original life span. Even if the victim's death is set in the Death
> Note beyond his/her original life span, the victim will die before the set
> time.
>

Therefore **I'd assume Bob to die within 11 days and a half**.


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2015-03-21T16:23:54.770
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2015-03-21T16:52:20.860
2020-06-17T09:17:53.303
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answer


Well it was after all a Shinigami's book so probably not but lets go the
logical way. If you set your death date at 22 days after this day then you die
22 days later. Then you make the Shinigami eye deal. Your current lifespan is
22 day because you set it at that day so then after making the deal you lose
half so that means 11 day out and your left with only 11 days to live. So
judging by this logic I think that you can not make the eye deal with out
losing half your lifespan.


CC BY-SA 3.0
2015-03-23T22:36:28.100
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2015-03-23T22:36:28.100
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answer