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Hunter's Chemistry is an Aux Core or a Skill RAM / Upgrade in Xenoblade Chronicles 2 and Torna ~ The Golden Country. It increases the Affinity of the entire party by up to 250 at the start of the battle, when starting with initiative. Initiative is obtained when the player starts the battle with the weapon unsheathed or when luring an enemy. Most barrier erecting story or quest battles will also provide initiative to the player. This effect will uniquely apply even when the equipped Blade is not engaged on the field, and stacks with all Hunter's Chemistries equipped to Blades on the active party.

The Skill RAM/Upgrade variants can be used to customize Poppi α, Poppi QT and Poppi QTπ as an Aux Core equivalent. For another equipment with a similar effect, see Shoulder to Shoulder.

Stats

Aux Core
Aux Core Rarity Effect Sell Price
Unrefined Refined
Hunter's Chemistry I Rarity1.png Increases Affinity by 150 when starting a battle with the initiative. 150 G 150 G
Hunter's Chemistry II Rarity1.png Increases Affinity by 175 when starting a battle with the initiative. 450 G 500 G
Hunter's Chemistry III Rarity2.png Increases Affinity by 200 when starting a battle with the initiative. 800 G 900 G
Hunter's Chemistry IV Rarity2.png Increases Affinity by 225 when starting a battle with the initiative. 1,300 G 1,450 G
Hunter's Chemistry V Rarity3.png Increases Affinity by 250 when starting a battle with the initiative. 1,400 G 1,550 G

Skill RAM
Skill RAM Effect Energy
Required
Ether Crystals Technical Manual
Create Crystallize
Hunter's Chemistry I Increases Affinity by 150 when starting a battle with the initiative. 20 120 72 ---
Hunter's Chemistry II Increases Affinity by 175 when starting a battle with the initiative. 40 400 160 ---
Hunter's Chemistry III Increases Affinity by 200 when starting a battle with the initiative. 60 720 264 Artificial Blade Report
Hunter's Chemistry IV Increases Affinity by 225 when starting a battle with the initiative. 80 1,120 392 Ether R&D Revolution
Hunter's Chemistry V Increases Affinity by 250 when starting a battle with the initiative. 100 2,880 720 Hypertech Made Easy

Refinement Recipes

Aux Core Requirement Materials Amount
Hunter's Chemistry I Category Any Vegetable Collectibles x3
Hunter's Chemistry II Category Any Vegetable Collectibles x6
Hunter's Chemistry III Category Any Vegetable Collectibles x9
Hunter's Chemistry IV Category Any Vegetable Collectibles x12
Hunter's Chemistry V Category Any Vegetable Collectibles x15

Sources

Xenoblade Chronicles 2

In Xenoblade Chronicles 2, the Aux Core is always obtained in its unrefined state, and must be refined within an Ether Furnace at an Aux Core Stall before becoming usable.

Hunter's Chemistry I

Dropped by

Name Spawn Area Level Rate
Field Armu Normal Gormott Province 3 - 11 14.0%
Glaw Garaffa Normal Gormott Province 5 - 11 14.0%
Hermit Tirkin Quest (DLC) Gormott Province 9 14.0%
Sabri Crustip Salvaging Gormott Province 6 - 7 14.0%
Snooz Volff Quest Gormott Province 5 14.0%
Winter Eks Normal Gormott Province 5 - 10 14.0%

Hunter's Chemistry II

Treasure Troves

Quest Rewards

Merc Mission Rewards

Dropped by

Name Spawn Area Level Rate
Bafoo Crustip Normal Empire of Mor Ardain 29 - 31 12.6%
Brionac Grynd Quest Empire of Mor Ardain 29 12.6%
Brionac Psychis Quest Empire of Mor Ardain 28 12.6%
Kyth Driver Normal Empire of Mor Ardain 28 12.6%
Land Volff Normal Empire of Mor Ardain 26 - 29 12.6%
Mukkle Medooz Salvaging Empire of Mor Ardain 25 - 29 12.6%
Mutinous Rhodri Quest Empire of Mor Ardain 29 12.6%
Natto Lizard Normal Empire of Mor Ardain 26 - 33 12.6%
Walker Trap Unique Kingdom of Uraya 26 12.6%

Challenge Battle Mode (DLC)

Challenge Name Difficulty Chest 1 Chest 2 Chest 3
Bewitching Dance CR2.png 1.35% 0.41% ---
Grazing Flock CR1.png 1.79% 0.55% ---
Pest Control CR1.5.png 0.88% 0.25% ---
Think of the Soldiers CR2.5.png 2.48% 0.84% ---
Titan Battleship Assault Special Battle 2.22% 0.73% ---

Hunter's Chemistry III

Dropped by

Name Spawn Area Level Rate
Dagus Lysaat Normal, Summon Leftherian Archipelago 42 - 44 11.2%
Pilum Tirkin Quest Argentum Trade Guild, Leftherian Archipelago 43 11.2%
Sarta Garlus Quest Kingdom of Tantal 43 11.2%
Spring-Shower Elliott Unique Kingdom of Tantal 42 11.2%
Svena Piranhax Normal Leftherian Archipelago 42 - 44 11.2%
Wacon Upa Normal Leftherian Archipelago 42 - 44 11.2%

Challenge Battle Mode (DLC)

Challenge Name Difficulty Chest 1 Chest 2 Chest 3
Bewitching Dance CR2.png --- --- 0.37%
Grazing Flock CR1.png --- --- 0.52%
Pest Control CR1.5.png --- --- 0.23%
Think of the Soldiers CR2.5.png --- --- 0.82%
Titan Battleship Assault Special Battle --- --- 0.70%

Hunter's Chemistry IV

Dropped by

Name Spawn Area Level Rate
Aatoban Garlus Normal Kingdom of Tantal 50 - 56 9.8%
Azure Driver Quest Empire of Mor Ardain 61 9.8%
King Laia Quest Temperantia 60 9.8%
Krug Driver Quest Kingdom of Uraya 62 9.8%
Marauder Laia Normal Temperantia 56 - 58 9.8%

Hunter's Chemistry V

Merc Mission Rewards

Dropped by

Name Spawn Area Level Rate
Deimos Sauros Normal Temperantia 90 - 92 8.4%
Immovable Gonzalez Unique Gormott Province 90 8.4%

Challenge Battle Mode (DLC)

Challenge Name Difficulty Chest 1 Chest 2 Chest 3
Attack of the Aspar Special Battle --- 0.56% 0.66%
Call the Exterminators Special Battle --- 0.92% 1.19%
Darkening Skies CR3.png --- 0.54% 0.66%
Dread Contagion CR4.png --- 0.76% 0.95%
Elma: Redux CR4.png --- 0.37% 0.43%
Otherworldly Fighter CR3.png --- 0.37% 0.43%
Panic at the Seaside CR3.png --- 0.22% 0.24%
Poisoned Paradise CR3.png --- 0.92% 1.19%
Sacred Wood CR3.png --- 0.90% 1.19%
Serious Showdown CR4.5.png --- 0.22% 0.24%
Temperantian Standoff CR2.png --- 0.22% 0.25%
This Year's Heropon CR3.png --- 0.36% 0.43%
Tiger! Tiger! IRL CR2.5.png --- 0.22% 0.24%
Torna's Finest CR4.png --- 0.76% 0.93%

Torna ~ The Golden Country

In Torna ~ The Golden Country, the Aux Core is always obtained in its refined state.

Hunter's Chemistry I

Treasure Troves

Dropped by

Name Spawn Area Level Rate
Lekut Feris Normal Gormott 8 - 14 14.0%
Nemus Camill Normal Kingdom of Torna 8 14.0%

Hunter's Chemistry II

Treasure Troves

Dropped by

Name Spawn Area Level Rate
Libelte Flamii Normal Kingdom of Torna 28 - 31 12.6%

Hunter's Chemistry III

Dropped by

Name Spawn Area Level Rate
Lapis Vang Normal Gormott 36 - 38 11.2%

Skill RAM / Upgrade

Poppiswap

The Skill RAM or Upgrade variant can be crafted through Poppiswap's "Create/Crystallize" menu using Ether Crystals obtained from Tiger! Tiger! or from crystallizing other Poppi Parts. Create costs and required Technical Manuals are present in the Stats section.

Tiger! Tiger!

Skill RAM Stage Treasure
Size
Treasure Rate (per Trove)
Chapter 2 – 7 Chapter 8+
Hunter's Chemistry I Stage 2 Small 1.50% ---
Stage 2 Large 5.00% ---
Hunter's Chemistry III Stage 2 Small 1.00% 4.00%
Stage 2 Large 3.00% ---
Hunter's Chemistry V Stage 2 Small --- 1.00%
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