Many of the NPC's in Tibia reacts and speak their opinion when you ask about Ferumbras. Most of it we can read on TibiaFandom:https://tibia.fandom.com/wiki/Ferumbras/Transcripts
Now, a question to those who are rich or lucky- do NPC’s react or change dialogs when you're wearing Ferumbras’ Hat or have full Mage(male)or Summoner(female)Outfit?
Additional: Does Scarlett send any message when you have Ferumbras’ Hat with you or Outfits mentioned before? With relation to question: https://www.tibiaqa.com/22893/what-are-all-the-orange-sentences-on-cobra-bastion-and-why-do-they-appear?show=22893#q22893
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