Resistance penetration

Elemental Penetration is a form of resistance reduction. Penetration is applied as damage is dealt, after other resistance calculations. This means that penetration will reduce a target's resistance even if the target's raw resistance value is far above its maximum resistance cap. Both reduction (e.g. from curses), and penetration can reduce a target's resistance below 0%. There is no minimum resistance floor.

Penetration only affects hits, which notably excludes damage over time effects.

Effectiveness

The percent increase in damage due to penetration can be calculated. First, you must be able to calculate damage done after resistances are applied, we used the following formula:

DamageEffective(DamageRaw,Resistance,Penetration) = (DamageRaw)(1 - Resistance + Penetration)

So to calculate the increase in damage from penetration we can use this equation:

+%DamageDueToPenetration(DamageEffective(DamageRaw,Resistance,Penetration) = (DamageEffective(DamageRaw,Resistance,Penetration) / DamageEffective(DamageRaw,Resistance,0)) * 100%

It is a simple exercise then, to prove that 1% penetration produces +1% damage against a monster with 0 resistance, and 1% penetration produces +4% damage against a monster with 75 resistance. Clearly, penetration is more useful against high resistance monsters, and less useful against low resistance monsters.

Examples

Consider a player using a skill with Penetrates 50% Fire Resistance dealing 100 fire damage to an enemy:

• If the enemy has +0% Fire resistance

The enemy's resistance will be treated at 50 lower than it is, which in this case will result in an effective −50% fire resistance. The enemy will take 150 fire damage.

• If the enemy has +25% Fire resistance

This will result in an effective −25% fire resistance. The enemy will take 125 fire damage.

• The enemy has +150% Fire resistance, but is capped at their maximum fire resistance of 75%

This will result in an effective 25% fire resistance. The enemy will take 75 fire damage.

• The enemy has +150% Fire resistance, but is capped at their maximum fire resistance of 75%. The enemy is cursed with Flammability before being attacked, which causes them to lose 30% Fire Resistance.

The enemy first loses 30% resistance, bringing them down to +120% fire resistance. They are still well above their maximum, and their resistance value remains at 75%. The 50% penetration then results in an effective 25% fire resistance. The enemy will take 75 fire damage.

• The enemy has +10% Fire resistance. The enemy is cursed with Flammability before being attacked, which causes them to lose 30% Fire Resistance.

The enemy first loses 30% resistance, bringing them down to −20% fire resistance. The 50% penetration then results in an effective −70% fire resistance. The enemy will take 170 fire damage.

Sources

Support Gems

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Unique Items

• The Tempestuous SteelThe Tempestuous Steel
  War SwordOne Handed Sword
  Physical Damage: (21-24) to (45-50)
  Critical Strike Chance: 5.00%
  Attacks per Second: (1.51-1.60)
  Weapon Range: 1.1 metresRequires Level 20, 41 Str, 35 Dex40% increased Global Accuracy RatingAdds (5-8) to (15-20) Physical Damage
  (8-14)% increased Attack Speed
  Hits can't be Evaded
  Attacks with this Weapon Penetrate 30% Elemental Resistances
  Gain 15% of Physical Attack Damage as Extra Fire Damage
  Gain 15% of Physical Attack Damage as Extra Lightning DamageThe blade thrums with wild energy
  Eager for vengeance against all who walk free.
• Agnerod EastAgnerod East
  Imperial StaffStaff
  Physical Damage: 57-171
  Critical Strike Chance: 7.00%
  Attacks per Second: 1.15
  Weapon Range: 1.3 metresRequires Level 66, 158 Str, 113 Int+18% Chance to Block Attack Damage while wielding a Staff40% increased Strength Requirement
  +(80-120) to Intelligence
  (30-50)% increased Lightning Damage
  +2 to Level of all Lightning Spell Skill Gems
  Damage Penetrates 20% Lightning Resistance
  100% increased Duration of Lightning AilmentsOne for each corner of the great Vinktar Square.
• Agnerod NorthAgnerod North
  Imperial StaffStaff
  Physical Damage: 57-171
  Critical Strike Chance: 7.00%
  Attacks per Second: 1.15
  Weapon Range: 1.3 metresRequires Level 66, 158 Str, 113 Int+18% Chance to Block Attack Damage while wielding a Staff40% increased Strength Requirement
  +(80-120) to Intelligence
  (30-50)% increased Lightning Damage
  +2 to Level of all Lightning Spell Skill Gems
  15% chance to Shock
  Damage Penetrates 20% Lightning ResistanceOne for each corner of the great Vinktar Square.
• Agnerod SouthAgnerod South
  Imperial StaffStaff
  Physical Damage: 57-171
  Critical Strike Chance: 7.00%
  Attacks per Second: 1.15
  Weapon Range: 1.3 metresRequires Level 66, 158 Str, 113 Int+18% Chance to Block Attack Damage while wielding a Staff40% increased Strength Requirement
  +(80-120) to Intelligence
  (30-50)% increased Lightning Damage
  +2 to Level of all Lightning Spell Skill Gems
  +5% to maximum Lightning Resistance
  Damage Penetrates 20% Lightning ResistanceOne for each corner of the great Vinktar Square.
• Agnerod WestAgnerod West
  Imperial StaffStaff
  Physical Damage: 57-171
  Critical Strike Chance: 7.00%
  Attacks per Second: 1.15
  Weapon Range: 1.3 metresRequires Level 66, 158 Str, 113 Int+18% Chance to Block Attack Damage while wielding a Staff40% increased Strength Requirement
  +(80-120) to Intelligence
  (30-50)% increased Lightning Damage
  Adds (5-15) to (100-140) Lightning Damage to Spells
  +2 to Level of all Lightning Spell Skill Gems
  Damage Penetrates 20% Lightning ResistanceOne for each corner of the great Vinktar Square.

Passive skills

The following passive skills affect penetration: Template:Passive table