Achievement Citizen of Issavi you will get after completing Aspiring Oracle and Wanted missions of the Kilmaresh Quest.
Grade : 1 Points : 2
Source : TibiaFandom
In other words, by obtaining an outfit I would say. That means you don't have to do the whole quest but only missions required for the outfit but also click the addons items I believe. It also means you don't have to do mission Aspiring Oracle :)
https://tibia.fandom.com/wiki/Citizen_of_Issavi
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