Chapter 4: "The unicorn horn is not a forbidden object"
Chapter 7: "Unicorn horns are forbidden"
i think the translation was messed up their wouldnt have been a reason to say it "wasnt" a forbidden object really, but mentioning it "was" to explain the high value would make sense. so then they corrected it this time lol. just a guess though.
hmm black market guy seems errr not nice persay but well he's not judging him much for the spirit magic and gave him more of a warning than a threat.
wonder what the deal with the elf is trying to push away masters, maybe because she can use spirit magic he be face some prejudice from people just for having her around... bugs me a little that he ignored the lil spirit xD but he cant go talking to air in front of everyone i suppose.