| Type | Armor |
|---|---|
| Defense | 67/49/43/40/46 |
| Set Bonus | Inferno effect when below 50% life You emit a blazing explosion when you are hit Helm: 5% increased melee damage Enemies are more likely to target you Melee attacks and projectiles cause chaos flames to erupt on enemy hits Headgear: 5% increased ranged damage You fire a homing chaos flare when using ranged weapons every 0.33 seconds Mask: 5% increased magic damage and 15% reduced mana usage Magic attacks summon damaging and healing flare orbs on hit Helmet: 40% increased minion damage and +2 max minions Summons a hydrothermic vent to protect you Hood: 5% increased rogue damage Rogue weapons unleash a volley of homing flames around the player every 2.5 seconds Rogue stealth builds while not attacking and slower while moving, up to a max of 110 Once you have built max stealth, you will be able to perform a Stealth Strike Rogue stealth only reduces when you attack, it does not reduce while moving The higher your rogue stealth the higher your rogue damage, crit, and movement speed |
| Grants Buff |  Hydrothermic Vent |
| Buff duration | Infinite (Helmet) |
| Buff tooltip | The hydrothermic vent will protect you |
| Grants Buff |  Inferno |
| Buff duration | Infinite (Under 50% Health) |
| Buff tooltip | Nearby enemies are ignited |
| Inflicts Debuff |  On Fire!100% chance |
| Debuff duration | 4, 8, or 12 seconds (Helm melee attacks) 3 seconds (Chaos Blaze, Chaos Geysers, Chaos Flares, Chaos Orbs, Chaos Flames, Homing Chaos Flares) |
| Debuff tooltip | Slowly losing life |
| Inflicts Debuff |  Brimstone Flames100% chance |
| Debuff duration | 2 seconds (Inferno) 1.5 seconds (Chaos Flares) |
| Debuff tooltip | Rapid health loss |
| Rarity |  |
| Sell | 14  40  (set) |
Chaos Flame
| Summons Minion |
|---|
| Hydrothermic Vent |
|
Hydrothermic armor is a craftable Hardmode armor set, crafted from Cores of Chaos, Hellstone Bars, and Scoria Bars. It requires 6 Cores of Chaos, 17 Hellstone Bars, and 32 Scoria Bars to make the whole set or 10 Cores of Chaos, 33 Hellstone Bars, and 60 Scoria Bars for a set with all five headpieces.
A full set consists of an Hydrothermic Armor and an Hydrothermic Subligar as well as five different headpieces: The Hydrothermic Mask, Hydrothermic Helmet, Hydrothermic Helm, Hydrothermic Headgear and Hydrothermic Hood. All of the helmets share the set bonus, but also each piece providing boosts to the specific class. All helmets also provide temporary immunity to lava and immunity to fire damage.
The Hydrothermic Armor gives 20 defense, +20 max life, 8% increased damage and 4% increased critical strike chance. The Hydrothermic Subligar gives 14 defense, 3% increased critical strike chance and 15% increased movement speed.
- The Hydrothermic Helm gives 33 defense, 12% increased melee damage, 10% increased melee critical strike chance, 18% increased melee speed, and +700 to Aggro.
Melee attacks have a 25% chance for On Fire! to be inflicted for 12 seconds, a 37.5% chance to be inflicted for 8 seconds, and a 37.5% chance to be inflicted for 4 seconds.
Its set bonus grants an additional 5% melee damage and causes melee attacks and projectiles to spawn chaos flames on enemy hits- Chaos flames deal 15% damage of the attack that spawned them, and can hit up to 3 times. Further damage added to the flame after it has reached 45 damage is reduced by 90%.
- Chaos flames are only generated from enemies that have a damage stat of 5 or higher, with the exception of enemies spawned from statues.
- The Hydrothermic Headgear gives 15 defense, 12% increased ranged damage, 10% increased ranged critical strike chance and reduces ammo cost by 25%.
Its set bonus grants an additional 5% ranged damage and causes ranged weapons to fire a chaos flare every 0.33 seconds that inflicts Brimstone Flames and On Fire!.- Chaos flares deal 25% of the damage of the attack that spawned them and are softcapped at 50 damage.
- The Hydrothermic Mask gives 9 defense, increases maximum mana by 100, 12% increased magic damage and 10% increased magic critical strike chance.
Its set bonus grants an additional 5% magic damage and allows magic attacks to summon healing and damaging orbs that inflict On Fire! on enemy hits.- Chaos orbs deal 62.5% of the damage of the attack that spawned them and are softcapped at 100 damage.
- Healing orbs heal for 10% of the projectile's damage dealt, reduced by 5% on each repeat pierce hit.
- The Hydrothermic Helmet gives 6 defense, 5% increased summon damage and increased minion knockback.
Its set bonus grants an additional 40% minion damage, +2 max minions, and summons a Hydrothermic Vent to fight for the player.- The Hydrothermic Vent floats over the player's head and fires at enemies for 190 damage. It also inflicts On Fire!.
- The Hydrothermic Hood gives 12 defense, 12% increased rogue damage, 10% increased rogue critical strike chance, 50% chance of not consuming rogue weapons and 5% increased movement speed.
Its set bonus grants an additional 5% rogue damage, gives rogue weapons the ability to spawn 8 chaos flames every 2.5 seconds that home in on enemies and inflict On Fire!, and gives a maximum rogue stealth of 110.- Homing chaos flames deal 50% of the damage of the attack that spawned them and are softcapped at 100 damage.
All helmets also provide the set bonus of giving a modified Inferno effect when below 50% health and to cause a fiery explosion on hit that inflicts On Fire!. The modified Inferno effect inflict nearby enemies with Brimstone Flames and deal 50 damage.
A full set always provides a minimum of 40 defense, +20 max life, 8% increased damage, 9% increased critical strike chance and 10% increased movement speed, temporary immunity to lava, immunity to fire damage, an Inferno effect when below 50% health, and a fiery explosion on hit that deals 100 damage.
Contents
Set
Helmet variants
Crafting
Recipe
| Crafting Station | ||
|---|---|---|
 Mythril Anvilor  Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
 | Scoria Bar | 15 |
 | Hellstone Bar | 8 |
 | Core of Chaos | 3 |
| Result | ||
 | Hydrothermic Armor | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 7 |
| Hellstone Bar | 4 |
| Core of Chaos | 1 |
| Result | ||
 | Hydrothermic Headgear | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 7 |
| Hellstone Bar | 4 |
| Core of Chaos | 1 |
| Result | ||
 | Hydrothermic Helm | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 7 |
| Hellstone Bar | 4 |
| Core of Chaos | 1 |
| Result | ||
 | Hydrothermic Helmet | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 7 |
| Hellstone Bar | 4 |
| Core of Chaos | 1 |
| Result | ||
 | Hydrothermic Hood | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 7 |
| Hellstone Bar | 4 |
| Core of Chaos | 1 |
| Result | ||
 | Hydrothermic Mask | 1 |
| Crafting Station | ||
|---|---|---|
| Mythril Anvil or Orichalcum Anvil | ||
| Ingredient(s) | Amount | |
| Scoria Bar | 10 |
| Hellstone Bar | 5 |
| Core of Chaos | 2 |
| Result | ||
 | Hydrothermic Subligar | 1 |
Trivia
- Hydrothermic armor used to be known as "Ataxia armor", in reference to the term Ataxia, which is the name given to medical symptoms that consist of diminished control of muscle movements.
| Scoria |
|---|
 Ore •  Bar •  Chaotic Brick •  Chaotic Brick Wall •  Seismic Hampick •  Tectonic Truncator •  Rift Reeler Hellfire Flamberge •  Vulcanite Lance •  Fault Line •  Helstorm •  Continental Greatbow •  Forbidden Sun •  Subduction Slicer Hydrothermic armor •  Hadal Mantle
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