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Indoor Attack Up is an Aux Core or a Skill RAM/Upgrade in Xenoblade Chronicles 2 and Torna ~ The Golden Country. It increases damage dealt by up to 45% when the user is in an indoors area. Any area with a roof above the character's head is treated as being indoors. Despite being inside their respective Titan's bodies, most areas in Uraya's Stomach and Tantal's Head, Upper and Lower Level are not considered indoors.

The Skill RAM/Upgrade variants can be used to customize Poppi α, Poppi QT and Poppi QTπ as an Aux Core equivalent.

Stats

Aux Core
Aux Core Rarity Effect Sell Price
Unrefined Refined
Indoor Attack Up I Rarity1.png Increases damage dealt indoors by 20%. 150 G 150 G
Indoor Attack Up II Rarity1.png Increases damage dealt indoors by 25%. 450 G 500 G
Indoor Attack Up III Rarity2.png Increases damage dealt indoors by 30%. 800 G 900 G
Indoor Attack Up IV Rarity2.png Increases damage dealt indoors by 35%. 1,300 G 1,450 G
Indoor Attack Up V Rarity3.png Increases damage dealt indoors by 40%. 1,400 G 1,550 G
Indoor Attack Up VI Rarity3.png Increases damage dealt indoors by 45%. 1,750 G 1,950 G

Skill RAM
Skill RAM Effect Energy
Required
Ether Crystals Technical Manual
Create Crystallize
Indoor Attack Up I Increases damage dealt indoors by 20%. 20 120 72 ---
Indoor Attack Up II Increases damage dealt indoors by 25%. 40 400 160 ---
Indoor Attack Up III Increases damage dealt indoors by 30%. 60 720 264 Nimble Nopon Get Girls
Indoor Attack Up IV Increases damage dealt indoors by 35%. 80 1,120 392 Artificial Blade Report
Indoor Attack Up V Increases damage dealt indoors by 40%. 100 2,880 720 Hypertech Made Easy

Refinement Recipes

Aux Core Requirement Materials Amount
Indoor Attack Up I Category Any Insect Collectibles x3
Indoor Attack Up II Category Any Insect Collectibles x6
Indoor Attack Up III Category Any Insect Collectibles x9
Indoor Attack Up IV Category Any Insect Collectibles x12
Indoor Attack Up V Category Any Insect Collectibles x15
Indoor Attack Up VI Category Any Insect Collectibles x18

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.

Indoor Attack Up I

Dropped by

Name Spawn Area Level Rate
Haaken Scout Story Gormott Province 9 - 10 14.0%
Sweeper Lysaat Story Gormott Province 7 - 9 14.0%

Indoor Attack Up II

Treasure Troves

Quest Rewards

Merc Mission Rewards

Dropped by

Name Spawn Area Level Rate
Damp Vang Story Empire of Mor Ardain 27 - 29 12.6%
Dobus Ansel Quest Kingdom of Uraya 19 12.6%
Flash Scout Normal Empire of Mor Ardain 31 - 33 12.6%
Lazy Parisax Quest Kingdom of Uraya 32 12.6%
Presser Lizard Normal Empire of Mor Ardain 27 - 29 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% ---

Indoor Attack Up III

Treasure Troves

Merc Mission Rewards

Dropped by

Name Spawn Area Level Rate
Chibal Peng Normal Kingdom of Tantal 38 - 40 11.2%
Emerald Piranhax Normal Gormott Province 39 - 42 11.2%
Emerald Piranhax Summon Gormott Province 40 - 42 11.2%
Mysterious Driver Quest Kingdom of Uraya 40 11.2%
Torrl Runner Normal Kingdom of Tantal 38 - 40 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%

Indoor Attack Up IV

Dropped by

Name Spawn Area Level Rate
Radclyffe Sovereign Normal, Summon World Tree 52 - 61 9.8%

Indoor Attack Up V

Quest Rewards

Merc Mission Rewards

Dropped by

Name Spawn Area Level Rate
Grash Pagul Normal Kingdom of Tantal 79 - 81 8.4%
Redom Crustip Normal Kingdom of Tantal 80 - 82 8.4%
Sarabashi Ropl Normal Empire of Mor Ardain 80 - 82 8.4%
Vampire Bride Marion Unique Kingdom of Uraya 65 8.4%

Challenge Battle Mode (DLC)

Challenge Name Difficulty Chest 1 Chest 2 Chest 3
Attack of the Aspar Special Battle 1.14% 0.56% ---
Call the Exterminators Special Battle 1.71% 0.92% ---
Darkening Skies CR3.png 1.09% 0.54% ---
Dread Contagion CR4.png 1.48% 0.76% ---
Elma: Redux CR4.png 0.81% 0.37% ---
Otherworldly Fighter CR3.png 0.81% 0.37% ---
Panic at the Seaside CR3.png 0.51% 0.22% ---
Poisoned Paradise CR3.png 1.71% 0.92% ---
Sacred Wood CR3.png 1.71% 0.90% ---
Serious Showdown CR4.5.png 0.51% 0.22% ---
Temperantian Standoff CR2.png 0.49% 0.22% ---
This Year's Heropon CR3.png 0.81% 0.36% ---
Tiger! Tiger! IRL CR2.5.png 0.51% 0.22% ---
Torna's Finest CR4.png 1.48% 0.76% ---

Indoor Attack Up VI

Challenge Battle Mode (DLC)

Challenge Name Difficulty Chest 1 Chest 2 Chest 3
9th Imp. Armored Div. CR5.png 0.83% 0.33% ---
Chickenheart Challenge CR3.png 2.35% 1.08% ---
Cloud King's Revenge CR4.png 0.48% 0.18% ---
Dino Drama CR3.5.png 1.20% 0.48% ---
Fiercest Faction CR4.png 0.48% 0.18% ---
Humanoid Alliance CR4.png 0.47% 0.18% ---
Mk. VIII CR4.5.png 2.25% 1.08% ---
Reinventing the Gogol CR4.png 0.84% 0.33% ---

Torna ~ The Golden Country

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

Indoor Attack Up I

Treasure Troves

Dropped by

Name Spawn Area Level Rate
Cascade Krabble Normal Gormott 12 - 16 14.0%
Kanoo Skwaror Normal Gormott 12 - 16 14.0%
Rinker Eks Normal Gormott 11 - 15 14.0%

Indoor Attack Up II

Treasure Troves

Dropped by

Name Spawn Area Level Rate
Imba Lizard Normal Gormott 32 - 34 12.6%
Ribage Grady Normal Kingdom of Torna 30 - 37 12.6%

Indoor Attack Up III

Treasure Troves

Dropped by

Name Spawn Area Level Rate
Zafirah Crustip Normal Kingdom of Torna 34 - 40 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+
Indoor Attack Up I Stage 1 Small 1.20% ---
Indoor Attack Up III Stage 1 Small 0.80% 3.33%
Indoor Attack Up V Stage 1 Small --- 0.67%
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