Even in real life.
There were originally 12 Saijo Ō Wazamono.
Then, 3 more got added.
So in the end, there were 15 Saijo Ō Wazamono.
The same thing will probably happen here in One Piece.
We started with 12 Saijo Ō Wazamono, then, Zoro will make Enma, Nidai Kitetsu, and Wado Ichimonji Saijo Ō Wazamono too.
That means Yoru and Shodai Kitetsu won't break!
There were originally 12 Saijo Ō Wazamono.
Then, 3 more got added.
So in the end, there were 15 Saijo Ō Wazamono.
The same thing will probably happen here in One Piece.
We started with 12 Saijo Ō Wazamono, then, Zoro will make Enma, Nidai Kitetsu, and Wado Ichimonji Saijo Ō Wazamono too.
That means Yoru and Shodai Kitetsu won't break!