Tome of Understanding 5e
Wondrous Item, very rare
This book contains intuition and insight exercises, and its words are 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 Wisdom score increases by 2, as does your maximum for that score. The manual then loses its magic, but regains it in a century.
Commentary by Sam West, Twitter: @CrierKobold
The Tome of Understanding, to me, is the self-help book we all need. By just reading it for a few hours a day over a week, we could permanently improve our mental health and clarity. If only this could really exist. Instead, if you’re a Cleric or Druid in D&D, this is going to be something you’ll seek out over most other magic items not for your character’s sanity, but to further empower the destruction their spellcasting can wreak.
Normally a character can’t improve a score above 20; this increases that maximum to 22, even if it doesn’t increase the score above 20 when used.
Only one character can benefit from a Tome per century; multiple characters can’t study the book simultaneously to both gain its ability score improving effects.
48 hours divided over six days results in six eight-hour sessions daily at minimum, which can be doable while adventuring should you only need to be physically adventuring 8 hours a day.
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