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Hunter's Chemistry (Aux Core)

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Hunter's Chemistry
XC2 item icon Aux Core.png
Effect (weakest) Increases Affinity by 150 when starting a battle with the initiative.
Effect (strongest) Increases Affinity by 250 when starting a battle with the initiative.
This article is about the Aux Core. For the Skill RAM, see Hunter's Chemistry (Skill RAM).

Hunter's Chemistry is an Aux Core in Xenoblade Chronicles 2 and Torna ~ The Golden Country. It increases the amount of affinity between Driver and Blade at the start of combat, in any of the following cases:

  • The party's weapons were drawn at the time the enemy aggroed the party.
  • The fight starts immediately after a loading screen, such as story bosses.
  • The fight is part of a Challenge Battle.

Shoulder to Shoulder is the equivalent for all other cases.

Overview[edit]

Hunter's Chemistry applies to the Blades active at the start of combat, even if the Aux Core is equipped to a Blade in a Driver's second or third slot. It also works across Aegis forms (so, for example, equipping Hunter's Chemistry on Pyra will increase Mythra's starting affinity if the latter is Rex's initial active Blade). Moreover, it stacks across the party; a Hunter's Chemistry Aux Core on one Driver will increase the starting affinity of the initial Blade of other Drivers. However, it does not affect the starting affinity of any Blade not active at the start of combat.

Many rare and legendary Blades have a default starting affinity of 500 or higher, meaning two rank V versions of the Aux Core are sufficient to achieve the maximum effect, starting combat at maximum affinity. Other Blades start at 450, 400, or 350 affinity by default, and these require a total of at least three of this Aux Core for the maximum effect, assuming their affinity is not otherwise augmented using e.g. cosmetic pouch items.

Hunter's Chemistry is an extremely worthwhile Aux Core to have, both because its effect is useful - the benefits of maximum affinity are very strong, to the extent that the start-of-combat boost can make or break a fight - and because its opportunity cost is so low. Just a few instances of this Aux Core on two or three of the party's backup Blades is all that is necessary, leaving all of the slots available on the party's primary Blades for other Aux Cores.

Details[edit]

Name Rarity XC2 item icon Aux Core unrefined.png Unrefined XC2 item icon Aux Core.png Refined
Price Recipe Price Effect
Hunter's Chemistry I Common 300 G XC2 item icon Vegetable.png Any vegetable collectible ×3 300 G Increases Affinity by 150 when starting a battle with the initiative.
Hunter's Chemistry II Common 900 G XC2 item icon Vegetable.png Any vegetable collectible ×6 1000 G Increases Affinity by 175 when starting a battle with the initiative.
Hunter's Chemistry III Rare 1600 G XC2 item icon Vegetable.png Any vegetable collectible ×9 1800 G Increases Affinity by 200 when starting a battle with the initiative.
Hunter's Chemistry IV Rare 2600 G XC2 item icon Vegetable.png Any vegetable collectible ×12 2900 G Increases Affinity by 225 when starting a battle with the initiative.
Hunter's Chemistry V Legendary 2800 G XC2 item icon Vegetable.png Any vegetable collectible ×15 3100 G Increases Affinity by 250 when starting a battle with the initiative.

Sources[edit]

Exchanges[edit]

None

Treasure troves[edit]

Treasure Trove Location Req. Field Skills Item rewards
※ Wooden chest 721 Uraya, In the maze of crates north of Fonsa Myma Port (image, map image) none XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common (x1)
XC2 item icon Core Crystal.png Common Core Crystal Common (x1)
※ Wooden chest 2249 Torna, Next to the house behind Jin's old house at Hyber Village (image, map image) none XC2 item icon Aux Core.png Opening Art II Common (x2)
XC2 item icon Aux Core.png Hunter's Chemistry II Common (x2)
※ Wooden chest 2546 Gormott, Seigle Fell, under a tree atop the cliff west of Hidden Hunting Camp (image, map image) none XC2 item icon Aux Core.png Hunter's Chemistry I Common (x2)

Quests[edit]

Quest Item rewards

The Missing Order

Merc missions[edit]

Items are only rewarded on the first completion of the merc mission.

Mission Region Item rewards

Bait Battle

Uraya

Big Ship Escort

Argentum

Lunch of Love

Mor Ardain

Enemies[edit]

If an enemy appears multiple times, that enemy has multiple chances to drop this item. FTG (first-time guarantee) indicates that the enemy is guaranteed to drop the item when it is first defeated.

Enemy Drop rate FTG Item
Aatoban Garlus 9.8% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry IV Rare
Azure Driver 9.8% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry IV Rare
Bafoo Crustip 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Brionac Grynd 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Brionac Psychis 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Dagus Lysaat (summon) 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Dagus Lysaat 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Deimos Sauros 8.4% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Field Armu 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common
Glaw Garaffa 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common
Hermit Tirkin 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common
Immovable Gonzalez (XC2) 8.4% Yes XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
King Laia 9.8% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry IV Rare
Krug Driver 9.8% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry IV Rare
Kyth Driver 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Land Volff (XC2) 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Lapis Vang 11.2% No XC2 item icon Aux Core.png Hunter's Chemistry III Rare
Lekut Feris 14% No XC2 item icon Aux Core.png Hunter's Chemistry I Common
Libelte Flamii 12.6% No XC2 item icon Aux Core.png Hunter's Chemistry II Common
Marauder Laia 9.8% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry IV Rare
Mukkle Medooz 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Mutinous Rhodri 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Natto Lizard 12.6% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Nemus Camill 14% No XC2 item icon Aux Core.png Hunter's Chemistry I Common
Pilum Tirkin (Argentum) 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Pilum Tirkin (Leftheria) 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Reyo Caterpile 12.6% No XC2 item icon Aux Core.png Hunter's Chemistry II Common
Rondel Feris 14% No XC2 item icon Aux Core.png Hunter's Chemistry I Common
Sabri Crustip 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common
Sarta Garlus 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Snooz Volff 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common
Spring-Shower Elliott 11.2% Yes XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Svena Piranhax 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Wacon Upa (XC2) 11.2% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Walker Trap 12.6% Yes XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Winter Eks 14% No XC2 item icon Aux Core unrefined.png Hunter's Chemistry I Common

Challenge battles[edit]

Challenge battle Chest Drop rate Item
Bewitching Dance XC2 icon salvage rusty chest.png Chest 1 1.35% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Bewitching Dance XC2 icon salvage red chest.png Chest 2 0.61% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Grazing Flock XC2 icon salvage rusty chest.png Chest 1 1.79% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Grazing Flock XC2 icon salvage red chest.png Chest 2 0.83% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Pest Control XC2 icon salvage rusty chest.png Chest 1 0.88% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Pest Control XC2 icon salvage red chest.png Chest 2 0.38% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Think of the Soldiers XC2 icon salvage rusty chest.png Chest 1 2.48% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Think of the Soldiers XC2 icon salvage red chest.png Chest 2 1.26% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Titan Battleship Assault XC2 icon salvage rusty chest.png Chest 1 2.22% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Titan Battleship Assault XC2 icon salvage red chest.png Chest 2 1.1% XC2 item icon Aux Core unrefined.png Hunter's Chemistry II Common
Bewitching Dance XC2 icon salvage white chest.png Chest 3 0.74% XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Grazing Flock XC2 icon salvage white chest.png Chest 3 1.04% XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Pest Control XC2 icon salvage white chest.png Chest 3 0.46% XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Think of the Soldiers XC2 icon salvage white chest.png Chest 3 1.64% XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Titan Battleship Assault XC2 icon salvage white chest.png Chest 3 1.4% XC2 item icon Aux Core unrefined.png Hunter's Chemistry III Rare
Attack of the Aspar XC2 icon salvage red chest.png Chest 2 0.84% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Attack of the Aspar XC2 icon salvage white chest.png Chest 3 1.32% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Call the Exterminators XC2 icon salvage red chest.png Chest 2 1.37% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Call the Exterminators XC2 icon salvage white chest.png Chest 3 2.37% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Darkening Skies XC2 icon salvage red chest.png Chest 2 0.81% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Darkening Skies XC2 icon salvage white chest.png Chest 3 1.32% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Dread Contagion XC2 icon salvage red chest.png Chest 2 1.13% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Dread Contagion XC2 icon salvage white chest.png Chest 3 1.9% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Elma: Redux XC2 icon salvage red chest.png Chest 2 0.56% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Elma: Redux XC2 icon salvage white chest.png Chest 3 0.85% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Otherworldly Fighter XC2 icon salvage red chest.png Chest 2 0.56% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Otherworldly Fighter XC2 icon salvage white chest.png Chest 3 0.85% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Panic at the Seaside XC2 icon salvage red chest.png Chest 2 0.33% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Panic at the Seaside XC2 icon salvage white chest.png Chest 3 0.49% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Poisoned Paradise XC2 icon salvage red chest.png Chest 2 1.37% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Poisoned Paradise XC2 icon salvage white chest.png Chest 3 2.39% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Sacred Wood XC2 icon salvage red chest.png Chest 2 1.34% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Sacred Wood XC2 icon salvage white chest.png Chest 3 2.39% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Serious Showdown XC2 icon salvage red chest.png Chest 2 0.33% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Serious Showdown XC2 icon salvage white chest.png Chest 3 0.48% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Temperantian Standoff XC2 icon salvage red chest.png Chest 2 0.33% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Temperantian Standoff XC2 icon salvage white chest.png Chest 3 0.49% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
This Year's Heropon XC2 icon salvage red chest.png Chest 2 0.55% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
This Year's Heropon XC2 icon salvage white chest.png Chest 3 0.85% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Tiger! Tiger! IRL XC2 icon salvage red chest.png Chest 2 0.33% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Tiger! Tiger! IRL XC2 icon salvage white chest.png Chest 3 0.49% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Torna's Finest XC2 icon salvage red chest.png Chest 2 1.13% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary
Torna's Finest XC2 icon salvage white chest.png Chest 3 1.87% XC2 item icon Aux Core unrefined.png Hunter's Chemistry V Legendary

Other[edit]

None


In other languages[edit]

Language Name Meaning
United Kingdom flag.svg English Hunter's Chemistry —
Japan flag.svg Japanese 先制キズナ
France flag.svg French Coalition
Germany flag.svg German Angreiferbande
Spain flag.svg Spanish Unión de Cazadores
Italy flag.svg Italian Caccia affiatata
China flag.svg Chinese (simplified) 先发牵绊
Taiwan flag.svg Chinese (traditional) 先制牽絆
South Korea flag.svg Korean 선제 인연
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