It is said that Jahad has officially no son. "officially"
but in the latest chapters we now know that wangnan and those who posses "the ring" has jahad's blood flowing in their veins. SO why are they Jahad's fatal weakness?
As said by rachel, jahad locked the door to the 135th and broke the key into half, the other half molded into the 13th month series and the other half to the ring. Jahad has no problem controlling the princesses who holds the 13th month series since during the operation of giving them his power, he was granted dominion over them, thus we can say he can control them if he wants to.
So wangnan and the others was desparately hidden by jahad and they were not ment to to climb to the top.
SO why is he afraid if they will climb to the top?
If for some reason "someone" will be able to collect all the 13th month series other than a princess and be able to ignite it, and he and wangnan and the others will also be able to reach the door to the 135th floor and be able to open it, it could signal the end to Jahad's immortality
take note that it was said that Jahad was able to gain imortality because he has a contract to the administrators of all the floors upto 134th that grants him not being able to be killed on those floors... MEANING???? if the 135th floor is opened, where jahad doesnt have an imortality contract he could die if he meets a powerful opponent.
Now, my theory is that in the future, that someone who is able to collect all the 13th month series would be Koon, he will climb to the top with wangnan and open the door, and by that time, Baam would already be so badass powerfull that he can challenge jahad.. I think jahad wouldnt be killed by wangnan or the others, but he could be killed by the slayers or irregulars like bam. or phantaminum or enryu or urek would show up.
what do you think??/