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essentially, these things you call FEATURES are actually BUGS in the games. The same goes for Dota and Counter-Strike, etc. Bugs are prohibited upon detection. But if we don't prohibit this BUG, then let's remove this item from the list of bugs: "In the Tower, Conflux, and Dungeon castles, the Artifact Merchant sells Artifacts or Magic Scrolls at prices that do not match their actual price." Is this also a feature?