Resistance Penetration Path of Exile 2 game term
Penetration causes the target's corresponding Resistance to be treated as lower than its actual value by the specified amount when of calculating Damage taken from your Hits. Resistances can only be Penetrated down to a minimum of 0% by default.
Since Penetration only affects Hits and applies to the target's defensive stats rather than your own offensive stats, it does not affect damage with Ailments.
The game's own definition, as shown when you hover the term in game.
Game data: Path of Exile 2 client · How we source this
Penetration causes the target's corresponding Resistance to be treated as lower than its actual value by the specified amount when of calculating Damage taken from your Hits. Resistances can only be Penetrated down to a minimum of 0% by default. Since Penetration only affects Hits and applies to the target's defensive stats rather than your own offensive stats, it does not affect damage with Ailments. Related terms: Resistances, Hit Damage, Damaging Ailments.
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Resistance Penetration FAQ — PoE 2 0.5.5f
What does Resistance Penetration mean in Path of Exile 2?
Penetration causes the target's corresponding Resistance to be treated as lower than its actual value by the specified amount when of calculating Damage taken from your Hits. Resistances can only be Penetrated down to a minimum of 0% by default. Since Penetration only affects Hits and applies to the target's defensive stats rather than your own offensive stats, it does not affect damage with Ailments.
What terms are related to Resistance Penetration?
Resistances, Hit Damage, Damaging Ailments.