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I meant that in addition to the patronus you could put other spells obtainable by challenge
and you could give a cosmetic or a reward when all 59 daily ridles are finished
npc's where we can sell potions and food.
A book full of creatures that are unlocked by finding them (like the location journal).
Give a reward to those who finish daily riddles/location journal etc.
Give custom quests to those who shopp the phoenix nick/dark follower nick.
Create trades for...