Does Hisoka conjure cards? It is seen in anime that Hisoka hurls many cards, yet he never runs out of cards.
He was never shown to buy, borrow or steal a deck of cards either.
Moreover, he gets his cards out of nowhere in his hands (he never slips his hands into his pockets or his clothing to fetch cards).

So does he have the power of conjuring cards?

Similarly, does Illumi have the power of conjuring needles, and does Gotoh have the power of conjuring coins?

Or do they (i.e. Hisoka, Illumi and Gotoh) belong to the category of Emmiter?
Those are real Cards, Coins and Needles. 

Chalk it up to Anime trope that he doesn't run out of Cards. Also its a logical fallacy to assume Hisoka doesn't buy/borrow/steal cards since its not shown. The seemingly cards out of nowhere is a nod to the "Magician" theme of Hisoka. 

Hisoka carries with him a normal Deck of cards and uses Nen (Shu(?)) to make it razor sharp enough to kill. Similarly Gotoh and Illumi can use Nen to fashion deadly projectiles.

One of the examples I can use here is that of Gotoh vs Hisoka fight.


   Hisoka was able to fire back the coins used by Gotoh, if they were conjured he would've simple "unconjured" them instead of shooting them down. This I think proves the coins were real 


This is a common trope in many Anime or Manga where the characters have seemingly endless supplies of "anything" they may need. Kunai and Shuriken in Naruto never seem to run out, Duelists in Yu-Gi-Oh never run out of cards etc.