Intelligence

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Memory and mental power.

Intelligence is an Ability Score and the primary ability of Wizards.

Intelligence affects your Arcana, History, Investigation, Nature, and Religion skills and improves spellcasting for Wizards, Eldritch Knights and Arcane Tricksters (better chance to hit enemies with Spell Attack Rolls; increases the Difficulty Class of spells with Saving Throws).

Intelligence Modifier Chart

Baldur's Gate 3 uses the Point Buy ruleset.

Ability score modifier chart

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

Related Items

Increases Intelligence "to"

•  Warped Headband of Intellect sets  Intelligence to 17

Increases Intelligence "by"

•  Harmonium Halberd reduces  Intelligence by -1

+1 to Saving Throws

•  Circlet of Psionic Revenge only if Githyanki
•  Cerebral Citadel Armour Illithid Protection
• Phalar Aluve Phalar Aluve Sing: 1d4 to [...] Intelligence Saving Throws

Advantage on Saving Throws

•  Fey Semblance Amulet Semblance of Fey: Advantage on Intelligence [...] Saving Throws.
•  Aberration Hunters' Amulet Aberration Hunter: A Githyanki [...] has Advantage on Intelligence Saving Throws.
•  Silver Sword of the Astral Plane Githborn Psionic Resistance: A Githyanki [...] has Advantage on Intelligence Saving Throws

Other

•  The Pointy Hat Glorious Pointy Hat: [...] bonus to Persuasion checks equal to your Intelligence Modifier.