Herphah:
Your Amity Level with the Adventurer's Guides is high enough to undertake special missions. These missions are very challenging but offer greater rewards and higher amity points.
For special missions, you should make a team with other adventurers of your level who are performing the missions of the Adventurer's Guides.
No, special missions are not requirements. You don't need to accept them if you don't want to.
"Alright."