Freyd had heard how plentiful the loot was on the twenty first floor, but had been too busy to investigate until now.  Firm Anima's progression was accelerating, and they would need additional resources in order to maintain their ascension.  He could also use the extra loot to keep practicing his merchant skills.  Finding a few unique items had emboldened him to collect more items and keep working his way up to maximum rank.   So here he was, sitting in the glowing underdark caverns of this