Secondary skills are weapon skills that cannot be raised directly, instead their value is inherited from a linked primary skill. Skills with different formulas will have considerably different values.
This dungeon also has portals to both un-train and specialization dungeons.
When setting a weapon skill as secondary, it will automatically link itself with the highest valid primary weapon skill available.
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Secondary weapon skills are set to 20 points less than their primary skill if the secondary skill is trained and 10 points less if the secondary skill is specialized.