Resistance Penetration
Penetration causes the specified amount to be subtracted from the target's corresponding Resistance when determining the damage they take from a Hit, to a minimum of 0.

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.
Skill Gem Quality /1
ItemStats
Wave of FrostPenetrates (0–20)% Cold Resistance
Monsters mods /1
NameLevelPre/SufDescriptionWeight
1UniqueMonster Damage Penetrates 25% Elemental Resistances
Delve Area mods /3
NameLevelPre/SufDescriptionWeight
1DelveAreaMonster Damage Penetrates 6% Elemental Resistances
19% increased Quantity of Items found in this Area
11% increased Rarity of Items found in this Area
7% increased Pack size
damage elemental
52DelveAreaMonster Damage Penetrates 9% Elemental Resistances
19% increased Quantity of Items found in this Area
11% increased Rarity of Items found in this Area
7% increased Pack size
damage elemental
173DelveAreaMonster Damage Penetrates 12% Elemental Resistances
19% increased Quantity of Items found in this Area
11% increased Rarity of Items found in this Area
7% increased Pack size
damage elemental
Misc mods /15
NameLevelDomainPre/SufDescriptionWeight
1FlaskUniqueDuring Effect, Damage Penetrates (5–8)% Resistance of each Element for which your Uncapped Elemental Resistance is highest damage elemental
Numbing1JewelPrefixDamage Penetrates (5–10)% Cold Resistance damage elemental cold
Searing1JewelPrefixDamage Penetrates (5–10)% Fire Resistance damage elemental fire
Surging1JewelPrefixDamage Penetrates (5–10)% Lightning Resistance damage elemental lightning
Numbing1JewelPrefixDamage Penetrates (1–2)% Cold Resistance damage elemental cold
Searing1JewelPrefixDamage Penetrates (1–2)% Fire Resistance damage elemental fire
Surging1JewelPrefixDamage Penetrates (1–2)% Lightning Resistance damage elemental lightning
1MapDeviceUnique10% more Monster Life
% increased Monster Damage
10% improved Rewards
Monsters gain 10% increased Maximum Life each time they are Revived
Monsters Overwhelm 4% of Physical Damage Reduction for each time they have been Revived
Monsters Penetrate 4% of Enemy Resistances for each time they have been Revived
map fragment level + [3]
life damage
1ExpeditionRelicPrefixMonsters Penetrate 30% Fire Resistance
1ExpeditionRelicPrefixMonsters Penetrate 30% Cold Resistance
1ExpeditionRelicPrefixMonsters Penetrate 30% Lightning Resistance
1ExpeditionRelicPrefixMonsters Penetrate 20% Chaos Resistance
of Cremation1UltimatumMapSuffixMonsters deal (70–100)% of Damage as Extra Fire
Monster Damage penetrates (10–15)% of Fire Resistance
of Glaciation1UltimatumMapSuffixMonsters deal (70–100)% of Damage as Extra Cold
Monster Damage penetrates (10–15)% of Cold Resistance
of Thunder1UltimatumMapSuffixMonsters deal (70–100)% of Damage as Extra Lightning
Monster Damage penetrates (10–15)% of Lightning Resistance
Item /1
Unrelenting Timeless Vaal Emblem
Monsters gain 10% increased Maximum Life each time they are Revived
Monsters Penetrate 4% of Enemy Resistances for each time they have been Revived
Monsters Overwhelm 4% of Physical Damage Reduction for each time they have been Revived
10% improved Rewards
Unique /1
+(10–15) to Intelligence
+(20–30)% to Cold Resistance
Damage Penetrates 75% Cold Resistance
Blind Chilled enemies on Hit
Passive /19
15% increased Fire Damage
Damage Penetrates 10% Fire Resistance
10% increased Magnitude of Ignite you inflict
30% increased chance to Shock
Damage Penetrates 15% Lightning Resistance
Attack Damage Penetrates 15% of Enemy Elemental Resistances
Damage Penetrates 15% Fire Resistance
Fire Exposure you inflict lowers Total Fire Resistance by an extra 5%
Damage Penetrates 15% Fire Resistance
+10 to Strength
Damage Penetrates 18% Fire Resistance
25% increased Fire Exposure Effect
Damage Penetrates 15% Fire Resistance
15% increased Duration of Damaging Ailments on Enemies
Damage Penetrates 15% Cold Resistance
Damage Penetrates 8% Lightning Resistance
Damage Penetrates 15% Cold Resistance
Cold Exposure you inflict lowers Total Cold Resistance by an extra 5%
Damage Penetrates 15% Cold Resistance
+10 to Intelligence
Damage Penetrates 15% Cold Resistance
+10 to Intelligence
Damage Penetrates 18% Cold Resistance
25% increased Cold Exposure Effect
Damage Penetrates 10% Lightning Resistance if on Low Mana
Damage Penetrates 15% Lightning Resistance
Damage Penetrates 18% Lightning Resistance
30% increased Critical Hit Chance against enemies with Lightning Exposure
Damage Penetrates 8% Cold Resistance
Damage Penetrates 15% Lightning Resistance
Damage Penetrates 15% Lightning Resistance
+10 to Dexterity
Damage Penetrates 15% Lightning Resistance
+10 to Dexterity
Damage Penetrates 18% Lightning Resistance
25% increased Lightning Exposure Effect
5% increased Skill Speed
30% increased Electrocute Buildup
Timeless Jewel Passive /3
Ritual of Immolation
Vaal Notable
(25–35)% increased Fire Damage
Damage Penetrates (2–4)% Fire Resistance
Ritual of Stillness
Vaal Notable
(25–35)% increased Cold Damage
Damage Penetrates (2–4)% Cold Resistance
Ritual of Thunder
Vaal Notable
(25–35)% increased Lightning Damage
Damage Penetrates (2–4)% Lightning Resistance
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