The stronghold has 3 difficulties; Normal, Augmented and Superior. The rewards from previous difficulties have to be equipped in order to start the next difficulty.
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Magic Enhancement Scroll upon completion.
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Caleb which can only be obtained from the Superior difficulty. It has a 1/250 chance of dropping upon each completion of the Stronghold of Magic (Superior).
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Magic Enhancement Scroll, which when opened, awards the player with one of three Enhancement slot item for the respective tier.