Tempered by War

50% of Cold and Lightning Damage taken as Fire Damage
50% less Cold Resistance
50% less Lightning Resistance [1]

Tasalio and Valako test you, child of the volcano. Prove yourself worthy.

Tempered by War is a keystone passive skill which causes 50% of Cold and Lightning Damage to be taken as Fire Damage at the cost of 50% less Cold Resistance and Lightning Resistance

For more information about taking damage as another element, see Damage taken as.

Mechanics

When combined with a "taken as Fire" Avian Twins Talisman no cold or lightning damage from hits is taken for the chosen element.

When combined with Mahuxotl's MachinationMahuxotl's Machination
Steel Kite ShieldChance to Block: 26%
Armour: (146-167)
Energy Shield: (30-35)
Movement Speed: -3%Requires Level 46, 60 Str, 60 IntCorrupted Soul
Divine Flesh
Eternal Youth
Everlasting Sacrifice
Immortal Ambition
Vaal PactThe Banished Architect sought to employ all the
darkest secrets of the Vaal... at the same time. no cold or lightning damage is taken; it is taken as either Fire or Chaos damage.

When combined with Sublime VisionSublime Vision
Prismatic JewelLimited to: 1<Aura bonus modifier>This world is not good enough for her,
so I will make a better one. Nothing
matters but the pursuit of perfection.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket. (Purity of Fire variation) and a max-rolled DawnbreakerDawnbreaker
Colossal Tower ShieldChance to Block: (43-48)%
Armour: (1305-2103)
Movement Speed: -3%Requires Level 67, 159 Str+(10-20) to maximum Life(150-250)% increased Armour
+(20-25)% Chance to Block
-1% Chance to Block Attack Damage for every 200 Fire Damage taken from Hits Recently
(10-20)% of Cold Damage taken as Fire Damage
(10-20)% of Lightning Damage taken as Fire Damage
(10-20)% of Physical Damage taken as Fire Damage
Scorch Enemies in Close Range when you Block"The newcomers warn of doom and death beyond mortal ken.
I ask, why should we fear the fire when we serve the Lord of Light?"
- Maxarius, the first High Templar, no cold and lightning damage is taken; it is taken entirely as Fire Damage. It is also possible to achieve 100% of Physical Damage taken as Fire Damage as well.

In cases where all damage is taken as another element (not just the hit damage), it is safe to not gear for the original resistance at all. Taking damage as another element also prevents element-specific penetration (e.g. The Shaper's cold penetration) from applying.

Note that due to the way less modifiers work with negative values, if cold or lightning resistance are negative, Tempered by War will actually raise those resistances (though never above -1%). This can be a problem for a Doryani's PrototypeDoryani's Prototype
Saint's HauberkArmour: (1107-1488)
Energy Shield: (190-255)
Movement Speed: -5%Requires Level 67, 109 Str, 94 Int(150-200)% increased Armour and Energy Shield
+(60-90) to maximum Life
Deal no Non-Lightning Damage
Armour also applies to Lightning Damage taken from Hits
Lightning Resistance does not affect Lightning Damage taken
Nearby Enemies have Lightning Resistance equal to yours"This was the first step in some grand design,
lost to the ages, now ours to decipher."
- Dominus, High Templar build.

Location

This keystone will conquer any keystones within the radius of a Lethal PrideLethal Pride
Timeless JewelLimited to: 1 Historic
Radius: LargeCommanded leadership over (10000-18000) warriors under (Akoya-Kaom-Rakiata)
Passives in radius are Conquered by the Karui
HistoricThey believed themselves the greatest warriors, but that savagery turned upon their own.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket. jewel with modifier Commanded leadership over (10000–18000) warriors under Rakiata.