On the last hand of poker against D’Arby, Jotaro refused to see his hand, nor exchange his cards. D’Arby was about to call Jotaro after he bet his remaining “soul chips”, but Jotaro interrupts by also betting the souls of Kakyoin and Avdol. Right after hearing this raise of ante, in exchange for information about Dio’s stand; D’Arby had a mental breakdown, causing him to admit defeat in his heart and lose the gamble.

Correction

Um actually … D’Arby didn’t lose when Jotaro raised using their souls. He lost after Jotaro raises using his mother’s soul.

The sequence of events is:

  1. Jotaro goes all in with his soul chips, together with Avdol’s.
  2. D’Arby raises him 6 chips
  3. Jotaro calls him, wagering Kakyoin’s soul using an IOU
  4. Jotaro further raises his mother, Holly’s soul, in exchange for information about Dio’s stand.