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Disciple of Lore is a heroic tier feat available to characters with an Intelligence score of 13 or higher. It is under the Learning and Lore feat category

Characters with the Disciple of Lore feat gain a +1 bonus to trained skills.[HotFL:313][HotFK:313]

Although the rulebooks' flavor text for Disciple of Lore mentions Ioun, exclusive worship of that deity is not a prerequisite for the feat.

Character optimization rates this as average for the wizard, possibly extending to other characters who are based around skills.