Tome of Clear Thought

Tome of Clear Thought is a magic item (wondrous item) of very rare rarity.

Tome of Clear Thought — fantasy item illustration. Tome of Clear Thought is a magic item (wondrous item) of very rare rarity.
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This magical book dictates methodologies for more rational and logical thinking. Spending 48 hours over 6 days (or fewer) reading and following the book’s methodologies increases your Intelligence score and your maximum Intelligence score by 2\. The tome then becomes a mundane item for a century before it regains its magic.

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Further reading

Jetpack7 Game Master Series
The Game Master's Book of Random Encounters
Jeff Ashworth · 2020
The Game Master's Book of Traps, Puzzles and Dungeons
Jeff Ashworth · 2022
Last updated 6/19/2026·Tags: item, wondrous item, very rare