Ariant item..

After you finish most or all quests of Ariant you get this item "Symbol of the Sand Bandits" or something like that...theres a need to save it for like any future quests of Magatia or just to drop it?

There are some more quests in KMS for Ariant that aren't out yet, I'm not sure whether or not they need the badge but it's better safe than sorry. Just keep it.