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Memory and mental power.
Intelligence affects your Arcana, History, Investigation, Nature, and Religion skills. It also improves spellcasting for wizards, fighters (especially valuable for Eldritch Knights), and rogues (especially valuable for Arcane Tricksters), by increasing the chance of hitting an enemy with spell attack rolls, due to the increased Difficulty Class of spells with saving throws.
Intelligence modifier chart
Baldur's Gate 3 uses the Point Buy ruleset.
| Ability score | Modifier value | Ability score | Modifier value | |
|---|---|---|---|---|
| 1 | -5 | 16-17 | +3 | |
| 2-3 | -4 | 18-19 | +4 | |
| 4-5 | -3 | 20-21 | +5 | |
| 6-7 | -2 | 22-23 | +6 | |
| 8-9 | -1 | 24-25 | +7 | |
| 10-11 | +0 | 26-27 | +8 | |
| 12-13 | +1 | 28-29 | +9 | |
| 14-15 | +2 | 30 | +10 |
Ways to increase
The following sources permanently increase a character's Intelligence score:
- Auntie Ethel's Hair can permanently increase Intelligence by +1
- The Mirror of Loss permanently increases any chosen ability score by +2 (up to 24)
- The Resilient feat permanently increases any chosen ability score by +1
Related items
Affecting Intelligence
Warped Headband of Intellect sets Intelligence to 17
Harmonium Halberd reduces Intelligence by -1
Devilfoil Mask reduces Intelligence by -1 per nearby creature also wearing a mask
Affecting Saving Throws
Cerebral Citadel Armour grants +1 to Intelligence saves
Fey Semblance Amulet provides advantage on Intelligence saves
For githyanki characters only:
Circlet of Psionic Revenge grants +1 to Intelligence saves
Aberration Hunters' Amulet provides advantage on Intelligence saves
Silver Sword of the Astral Plane provides advantage on Intelligence saves
Benefiting from Intelligence
The Pointy Hat grants a bonus to Persuasion ability checks equal to the wearer's Intelligence modifier