# Tome of Clear Thought > [!info] Item Details > | | | > |---|---| > | **Category** | Wondrous Items | > | **Rarity** | Very Rare | > | **Attunement** | No | > | **Source** | DMG p.208 | --- ## Description This book contains memory and logic exercises charged with magic. If you spend 48 hours over a period of 6 days or fewer studying the book's contents and practicing its guidelines, your Intelligence score increases by 2, as does your Intelligence maximum. The tome then loses its magic, but regains it in a century. --- ## Properties - Study for **48 hours over 6 days**: **+2 Intelligence** and **+2 Intelligence maximum** (permanent). - Loses its magic after use and **regains it in 100 years**. - Consumable (single use) — no attunement required.