The so-called "Tongue Coins" were not currency made from tongues, but a peculiar mineral product that grew exclusively within the Ghoul Realm.
They were called "Tongue-Spitting Ore." This ore could absorb a certain amount of Ghoul Realm essence and store it inside, but it could not preserve it for long. At regular intervals, it expelled the essence within, forming tongue-shaped protrusions on the surface of the stone, hence its name.
Because the mineral had a natural purifying effect, it was favored by ordinary Ghoul Realm creatures. Tongue-Spitting Ore was produced in moderate quantities throughout the Ghoul Realm, so it had become widely used as circulating currency more than two thousand years ago.
It was divided into different denominations according to quality and thickness, ranging from one to five hundred tongues, with tongues as the unit. Zhang Chen had twenty of the highest-grade Tongue Coins, each worth five hundred tongues. If one was lucky while storing the coins, essence tongues might even grow from them, which could be exchanged for a good price.
"I should've prepared some currency for the clown and the others. It would've made things easier for the two of them."
"Don't worry about clever people like them. By the way, what's your current objective?" Elizabeth asked.
"The Soul Stone within me was once an almost one-of-a-kind rare creature born in the Ghoul Realm. It was harmed by villains back then and nearly died in the Ghoul Realm. In the end, it escaped while severely injured and was killed by a Hell Envoy. By coincidence, I acquired its core remains at an auction in the Prison Realm. That was how it became my Soul Stone and survived until now."
"How strange. A Hell Envoy actually chopped such a rare ghost creature into pieces and auctioned it off, without