It is a reward for completing the quest "Unfathomable Depths."
This section contains bugs related to Ancient Knowledge (Skyrim). Before adding a bug to this list, consider the following:
- armor bonus to all armor types except Dwarven armor. This can happen even after the official patch 18.104.22.168.8 that supposedly has the fix for the bug. Ancient Knowledge gives 25%
- Even though the effect's description says it only improves how fast Smithing can level up, it may improve how far armor and weapons can be upgraded instead.
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