# Keen Mind *Source: Player's Handbook (2024) p. 205* **Prerequisite**: 4th; Intelligence 13 or higher You gain the following benefits. **Ability Score Increase.** Increase your Intelligence score by 1, to a maximum of 20. **Lore Knowledge.** Choose one of the following skills: [Arcana](Mechanics/CLI/rules/skills.md#Arcana), [History](Mechanics/CLI/rules/skills.md#History), [Investigation](Mechanics/CLI/rules/skills.md#Investigation), [Nature](Mechanics/CLI/rules/skills.md#Nature), or [Religion](Mechanics/CLI/rules/skills.md#Religion). If you lack proficiency in the chosen skill, you gain proficiency in it, and if you already have proficiency in it, you gain Expertise in it. **Quick Study.** You can take the [Study](Mechanics/CLI/rules/actions.md#Study) action as a Bonus Action.