Rohan has a feeling that Josuke is cheating at cee-lo, and cuts off his own pinky. If he is unable to figure out Josuke's trick in the next round, he says he will pay him 2 million yen to have him use Shining Diamond to fix his finger. But if Rohan does figure it out, he says he'll take Josuke's pinky instead. He even calls Tamami to act as a mediator, having him use his Stand ability so Josuke can't play fairly the next round, either.
I'll use that to ask you to fix 
my pinky with Shining Diamond.
سأنفقها لأطلب منك إصلاح خنصري
بألماسة ساطِعة
Die sind dein Lohn dafür, meinen kleinen
Finger mit Shining Diamond zu heilen.
Los usaré para pedirte que cures
mi meñique con Shining Diamond.
Los usaré para pedirte que cures
mi meñique con Shining Diamond.
et Crazy Diamond pourra me soigner.
Te li darò per chiederti di guarire
il mio mignolo con Shining Diamond.
Vou pagar isso para você me curar
com seu Crazy Diamond.