Are You Really Only Thirteen?

"1. Based on the principles behind the birth of Nen Abilities, only the creator of the book Swamp Man could have developed such a powerful Nen Ability that so perfectly matched the book's content."

"2. Based on the content of Swamp Man, the first human transformed by the ability was called a Swamp Man, while humans transformed by a Swamp Man were collectively called Marshfolk."

"3. Taking the first and second points as references, the condition for creating the first Swamp Man was likely the book signing held by the author, Davidson. Given this ability's scale and impact, its activation conditions had to be stringent—at least five or more."

"4. This is only speculation. The activation conditions are: ① acknowledging the book Swamp Man, ② acknowledging Swamp Man's author Davidson, ③ obtaining a book bearing Davidson's personal signature, ④ making physical contact with Davidson, ⑤ after fulfilling multiple conditions, the ability can only activate after death. Given the ability's effects, the possibility of inducing suicide can be ruled out."

"5. The first Swamp Man born after fulfilling the activation conditions will transform more Marshfolk by causing 'death.'"

"6. Likewise, beginning with the second transformed Marshfolk, they can only increase their numbers by causing 'death'—in other words, by killing people with their own hands."

"7. Transformed Marshfolk are like copied data; they retain everything belonging to the original person."

"8. The transformation of Marshfolk is highly concealed. Using murderers as a reference, the preliminary conclusion is: when no third party is present, the ability's conditions will be triggered and death will begin to be created."

"9. In summary, the condition for Marshfolk to spread is to cause death. Taking the Detana Restaurant incident as an example, it can basically be concluded that even deaths not intentionally caused by Marshfolk can serve