User blog comment:Icey778/Rap Battles of Excellence Redux 7: Doflamingo vs Hisoka/@comment-9623756-20151115225015/@comment-25012248-20151115231220

Yeah it references card numbers. The theme is gambling because this is the connection. I can explain better. Doffy is called Joker in OP. He has 4 chairs that have all 4 suits of cards. Clubs, diamond, spade, hearts. I chose gambling because why not? It relates to both and Hisoka basically gambles with people's lives, Joe.

This is why cards and gambling. The words hand, black jack, chips, and folded make sense.