Intelligence describes Geralt's mental acumen and his ability to acquire and retain knowledge. Intelligence affects Geralt's capacity to learn skills (e.g. potion brewing) and to absorb knowledge (about creatures, plants, or the methods of preparing components specified in potion formulae). Intelligence also influences the intensity of Signs and the effort required to cast them, as well as Geralt's vulnerability to attacks directed at his mind. Development of Signs past level 2 must be preceded by a proportionate advance in Intelligence.


Tier I

Intelligence (Level 1)	Effects: Base Sign Intensity +10%
	Notes: Unlocks level 2 Signs.
	Requires: Bronze Talent

Potion Brewing	Effects: Enables brewing of potions.
	Notes: None
	Requires: Story-based Ability

Rising Moon	Effects: Sign Intensity +100%
	Notes: Works only during moonrises.
	Requires: Consumption of the Golem's Pith potion.

Tier II

Intelligence (Level 2)	Effects: Base Sign Intensity +10%
	Notes: Unlocks level 3 Signs.
	Requires: Bronze Talent

Herbalism	Effects: Enables identification and gathering of herbs.
	Notes: None
	Requires: Bronze Talent

Monster Lore	Effects: Provides knowledge about selected, not yet encountered monsters.
	Notes: None
	Requires: Bronze Talent

Oil Preparation	Effects: Enables creation of oils.
	Notes: None
	Requires: Bronze Talent

Tier III

Intelligence (Level 3)	Effects: Base Sign Intensity +20%
	Notes: Unlocks level 4 Signs.
	Requires: Silver Talent

Cleansing RItual	Effects: Grants Geralt the ability to use the Cleansing Ritual at Places of Power.
	Notes: None
	Requires: Silver Talent

Ingredient Extraction	Effects: Increases chance of extracting ingredients from both herb plants and defeated foes.
	Notes: None
	Requires: Silver Talent

Bomb Preparation	Effects: Enables production of bombs.
	Notes: None
	Requires: Silver Talent

Tier IV

Intelligence (Level 4)	Effects: Base Sign Intensity +20%
	Notes: Unlocks level 5 Signs.
	Requires: Silver Talent

Focus	Effects: Sign Duration +25%
	Notes: None
	Requires: Silver Talent

Life Ritual	Effects: Grants Geralt the ability to use the Life Ritual at Places of Power.
	Notes: None
	Requires: Silver Talent

Magic Frenzy	Effects: Sign Intensity +25%
	Notes: Works only when Geralt has less than 25% Vitality.
	Requires: Silver Talent

Tier V

Intelligence (Level 5)	Effects: Base Sign Intensity +40%
	Notes: None
	Requires: Gold Talent

Mental Endurance	Effects: Endurance required for casting Signs is reduced by 25%.
	Notes: None
	Requires: Gold Talent

Intensity	Effects: Sign Intensity +20%
	Notes: None
	Requires: Gold Talent