It just doesn't seem to be true if it'd only work on Shinryu and no other NM.
POIDH is all I can say because I'm too tired to come up with a legitimate argument D:
Odin.Ryuotas said:
It does not proc on Notorious-Monsters or Dark-Based standard monsters... the game is broken, but I don't think we've quite reached the threshold of complete and utter lunacy, gained from a weapon that is incredibly easy to obtain, no less.
Wiki has been known to be wrong... I once typed Salma Hayek in the standard Wikipedia, and my search resulted in a page of "Tyrone is 3 billion percent sure he did not father Tyisha's baby." True story.
On a side-note, nice Shogo avatar.