Hidden Bonus?

[THLPSC]

Is there some sort of hidden bonus?
http://psupedia.info/Secrit_Cross

[Crysteon]

There was a rumor that it had a Bonus with Sorcerer's Rod, but nobody confirmed it in the very end.

[milranduil]

Perhaps I should test that while I still have mine rofl. I don't need stamps for anything anymore since pumps drop loloften.

[Crysteon]

Even the JP wiki ignores the answer for that...it doesnt list any kind of bonus, lol.