"Not very," Zatanna answered. "But it would be dangerous for you if you revealed yourself, we would have to be quick. No time to concern ourselves with who is and isn't deserving of a second chance or whatever it is you want to do with the souls." She had hoped their intentions were somewhat noble but she really hadn't questioned them any more deeply than surface level.
She nodded as Loki looked over the coin. "That is a human soul. They're essentially currency down here, and of course the more coins the more powerful the demon. In most cases, fresh souls are brought in by the actions or manipulations of demons on Earth, some people sell their own," others were like Constantine and fucked up badly enough that they got their own souls claimed. Maybe she really would kill him this time. "But once they're down here the coins are spent or traded all the same. A few get consumed by demons, some pass between thousands of demonic hands, others end up in that bank."