Made with NaturalCrit -- The Homebrewery.
 kaliak and  diretooth have DNA in this. A lot of DNA.
I wanted to give this away as a freebie for those that came to visit my KFS booth at various cons, and probably will give it away at the cons I go to in the future!
It's not perfect, but, I wanted to share it anyway.

Wondrous Item (common, kobold only)

Description: The Kobold Stab List is an enchanted, pocket-sized book carried by every kobold to track people they have met, ordered from the most disliked to the least. The book features rough parchment pages and is crudely bound in leather. Each page can contain up to twelve individuals, including notes on why they are on the list, and how the kobold currently feels about them. The book grows steadily in content as everyone the kobold meets eventually finds their way onto the list. Stab Lists are typically not locked or secured, but are immutible to everyone except for the kobold that it is attuned to.

Ranking:

The ranking of each person is not automatic—every update requires a conscious decision by the kobold. The kobold can mentally focus on a name and choose to change their placement on the list, either promoting or demoting them based on recent actions.

Typical Page Example:

Rank 1: Most Stabby
Name: Sir Renald the Arrogant
Reason: Called me a "lizard," denied me my share of loot, threatened the warren.
Notes: Weak spot: his knee. Stab until he apologizes.

Rank 2: Annoyingly Stabby
Name: Mira the Bard
Reason: Keeps singing songs about "tiny dragons." Patronizing.
Notes: Play along, then stab when she least expects it.

Rank 3: Barely Stabby
Name: Jenna the Farmer
Reason: Tried to shoo me away, but gave me food later.
Notes: Move down if she shares more chickens.

Rank 4 to 12:
Each rank includes the name, the reason, and any specific notes about the person.

Attunement:

A young kobold, when ready to properly face the world, would attune to their book. This attunement can occur either as a Blood Oath to their Warren or Kobold Kind, to assemble the book in secrecy, or by commiting The First Stab in the presence of the book. By no means the only mechanisms of attunement, these are the ones that are the most common or known. Each kobold culture of warren will likely have their own abilities and rituals to tie tomes to new and upcoming members of their warren.

Death and Transference

Once the owner of the book has passed, the book becomes immutible. If the book is attempted to be attuned to another kobold, the book may reject the new attunement or accept the new kobold. It is also possible for stab lists to be merged into a single book, one tome becoming blank and the other one gaining the prior's entries. The success of this depends on whether the kobold belongs to the same clan as the original and how close the two were in life. Family ties or blood lines, although rare to be known in kobold culture, increases the chances of successful attunement with the departed's book.

How The Book Came To Be:

As Kobolds started to become more of a part of civilization, it became apparent that they would become subject to the same laws, rules, and regulations among other races and species and that acts of violence would be answered by law, consequences, and cost. Therefore, the book not only underlined kobold's tendancy to have long memories, grudges that would last lifetimes, and the want to strike at the right moment, but this would allow the kobold to be able to judge and render value calls to determine if the punishment for such crimes is worth the retribution to the target/victim. It also should be known that the book and it's entries may also suggest a level of punitive retribution that is different than just stabbing, sometimes other remedies such as biting, clawing, or other punishments can be illustrated.