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.
Right... I guess things that happen 
twice can happen a third time.
أجل... أظنّ أنّ ما يحدث مرّتين مُرجّح
أن يحدث مرّة ثالثة
Recht haste … Wenn was zweimal geschieht,
geschieht’s auch ein drittes Mal.
Es verdad. Si algo pasa dos veces,
bien podría pasar tres.
Es verdad. Si algo pasa dos veces,
bien podría pasar tres.
Effectivement,
jamais deux sans trois…
Eh già! A quanto pare a volte
è proprio vero che non c'è due senza tre!
É mesmo, né? Se acontece
duas vezes, por que não três?