Those who travel the layers of Hell for endless souls or creative creations are known as Hell Scavengers. No matter where they are, they know where many resources can be found, and what items can be harvested from different creatures. Many scavengers avoid their duties (of being endlessly tortured) by supplying higher demons with the items they collect. Though many are selfish, some are willing to scavenge the hells for others as well.
As a Hell Scavenger, you know the in and outs of what is valuable throughout Hell. You can identify other scavengers around your Layer and attempt to speak, trade, sell or buy with them. When harvesting a body part or valuable from an enemy, you have skilled hands, meaning you can collect more than a normal HellFiend. When harvesting or collecting, you may roll a 1d4, if you roll an even number, you get +1 of that reagent. Lastly, when selling or buying reagents, you may add half your proficiency bonus to your Insight/Persuasion checks.