Impregnable Defense

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Impregnable Defense is a repeatable Daily Commission that can occur in various locations in Teyvat.

Steps

Quest Description

Defeat all enemies and protect the Ley Line Monolith.

Complete the challenge by protecting the Ley Line Monolith (0/1)
Enemies defeated (0/X)

Gameplay Notes

Failing the challenge will cause the monolith to be destroyed, only to be replaced by another monolith with no additional dialogue or achievements.
Sometimes, extra assets spawn along the monolith to assist with combat, these include: Exploding Barrels , Hydro Ambers, Thunder Dwellings, Nimbus Gems and Thunder Sakura Boughs.
Enemies do not drop loot or experience when killed.

Rewards

This commission grants the following AR-dependent rewards upon completion:

Adventure Rank
12–15	10	175	2,775	25	1–4	0–1
16–20	10	200	3,200	30	1–4	0–1
21–25	10	200	3,625	35	1–3	0–2
26–30	10	225	4,050	35	1–3	0–2
31–35	10	225	4,475	40	1–3	0–2
36–40	10	250	4,900	45	0–2	1–3
41–45	10	250	5,325	50	0–2	1–3
46–50	10	250	5,750	50	0–2	1–3
51–55	10	250	6,150	55	0–1	1–4
56–59	10	250	6,575	60	0–1	1–4
60	10	—	9,075	60	0–1	1–4

Enemies

Dragonspine

At the ruins along the coast directly south of Starglow Cavern
- Challenge Target: Defeat 10 monster(s)
- Enemies:
  - Wave 1: Hilichurl Fighter ×3
  - Wave 2:
    - Cryo Hilichurl Grenadier ×2
    - Cryo Hilichurl Shooter ×1
    - Electro Hilichurl Shooter ×1
  - Wave 3:
    - Cryo Hilichurl Grenadier ×2
    - Ice Shieldwall Mitachurl ×1
Starting location

Entombed City - Outskirts

Outside the entrance to Starglow Cavern that faces west
- Challenge Target: Defeat 10 monster(s)
- Enemies:
  - Wave 1: Ice Shield Hilichurl Guard ×3
  - Wave 2: Hilichurl Fighter ×3
  - Wave 3:
    - Electro Hilichurl Shooter ×2
    - Cryo Hilichurl Shooter ×1
    - Ice Shieldwall Mitachurl ×1
Starting location

Bishui Plain

At the road intersection below Wuwang Hill
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1:
    - Hilichurl Fighter ×2
    - Hilichurl Berserker ×2
  - Wave 2:
    - Wooden Shield Hilichurl Guard ×3
    - Hilichurl Shooter ×1
  - Wave 3:
    - Hilichurl Berserker ×1
    - Wooden Shield Hilichurl Guard ×1
    - Blazing Axe Mitachurl ×1
Starting location
North of the Teleport Waypoint on the western archipelago
- Challenge Target: Defeat 12 monster(s)
- Enemies:
  - Wave 1:
    - Hilichurl Fighter ×3
    - Hilichurl ×2
  - Wave 2:
    - Wooden Shield Hilichurl Guard ×2
    - Hilichurl Berserker ×1
  - Wave 3:
    - Hilichurl Fighter ×2
    - Hilichurl Grenadier ×2
Starting location

Guili Plains

Directly east to the Teleport Waypoint overlooking Luhua Pool
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1: Rock Shield Hilichurl Guard ×4
  - Wave 2:
    - Hilichurl Fighter ×2
    - Hilichurl Berserker ×2
  - Wave 3:
    - Pyro Hilichurl Shooter ×2
    - Blazing Axe Mitachurl ×1
Starting location

Huaguang Stone Forest

Directly south of the Mt. Aocang Teleport Waypoint
- Challenge Target: Defeat 12 monster(s)
- Enemies:
  - Wave 1:
    - Hilichurl Fighter ×3
    - Hilichurl Berserker ×1
  - Wave 2:
    - Wooden Shield Hilichurl Guard ×2
    - Hilichurl Grenadier ×2
  - Wave 3:
    - Rock Shield Hilichurl Guard ×3
    - Geo Samachurl ×1
Starting location

Qingyun Peak

West of the Statue of the Seven
- Challenge Target: Defeat 13 monster(s)
- Enemies:
  - Wave 1: Hilichurl Fighter ×4
  - Wave 2:
    - Wooden Shield Hilichurl Guard ×2
    - Hilichurl Berserker ×2
    - Hydro Samachurl ×1
  - Wave 3:
    - Hilichurl Fighter ×2
    - Hilichurl Grenadier ×2
Starting location

Qiongji Estuary

In the plains west of the Teleport Waypoint above Mingyun Village
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1:
    - Hilichurl Fighter ×2
    - Wooden Shield Hilichurl Guard ×2
  - Wave 2:
    - Rock Shield Hilichurl Guard ×2
    - Blazing Axe Mitachurl ×1
  - Wave 3:
    - Electro Hilichurl Shooter ×2
    - Hilichurl Grenadier ×2
Starting location

Amakumo Peak

Southwest of the Teleport Waypoint east of Koseki Village
- Challenge Target: Defeat 14 monster(s)
This variant includes a Thunder Sakura Bough and Thunder Dwelling near the monolith.
- Enemies:
  - Wave 1:
    - Geo Samachurl ×1
    - Pyro Hilichurl Shooter ×1
    - Cryo Hilichurl Shooter ×1
    - Hilichurl Berserker ×2
  - Wave 2:
    - Dendro Samachurl ×1
    - Pyro Hilichurl Shooter ×2
    - Hilichurl Grenadier ×1
    - Electro Hilichurl Grenadier ×1
  - Wave 3:
    - Anemo Samachurl ×1
    - Pyro Hilichurl Shooter ×2
    - Crackling Axe Mitachurl ×1
Starting location

Araumi

Northeast of the Teleport Waypoint in Araumi
- Challenge Target: Defeat 15 monster(s)
- Enemies:
  - Wave 1:
    - Wooden Shield Hilichurl Guard ×2
    - Hilichurl Fighter ×2
    - Electro Hilichurl Shooter ×1
    - Pyro Hilichurl Shooter ×1
  - Wave 2:
    - Anemo Samachurl ×1
    - Electro Samachurl ×1
    - Hilichurl Berserker ×2
    - Hilichurl Fighter ×2
  - Wave 3:
    - Electro Hilichurl Grenadier ×1
    - Hilichurl Grenadier ×1
    - Crackling Axe Mitachurl ×1
Starting location

Chirai Shrine

At the entrance gate of Chirai Shrine
- Challenge Target: Defeat 8 monster(s)
- Nearby Hilichurls and a Hydro Samachurl will become aggressive towards the monolith if they spawn in the area.
- Enemies:
  - Wave 1:
    - Anemo Specter ×1
    - Geo Specter ×2
  - Wave 2:
    - Hydro Specter ×2
    - Pyro Hilichurl Shooter ×1
    - Electro Hilichurl Shooter ×1
  - Wave 3: Ruin Cruiser ×2
Starting location

Fort Mumei

Southernmost island of Fort Mumei
- Challenge Target: Defeat 15 monster(s)
- Enemies:
  - Wave 1:
    - Treasure Hoarders: Scout ×2
    - Treasure Hoarders: Marksman ×2
    - Treasure Hoarders: Seaman ×1
  - Wave 2:
  - Wave 3:
Starting location
Northernmost island of Fort Mumei
- Challenge Target: Defeat 8 monster(s)
- Wave 1:
  - Electro Abyss Mage ×1
  - Pyro Hilichurl Shooter ×2
  - Electro Hilichurl Grenadier ×2
- Wave 2:
  - Pyro Hilichurl Shooter ×1 (shoots 5 arrows at a time, instead of just 1)
  - Crackling Axe Mitachurl ×1
  - Blazing Axe Mitachurl ×1
Impregnable Defense Fort Mumei Start Location 2.png
Starting location

Seirai Island

North of "Seiraimaru"
- Challenge Target: Defeat 12 monster(s)
- This variant includes a Thunder Sakura Bough and Nimbus Gems near the monolith.
- Enemies:
  - Wave 1:
  - Wave 2:
  - Wave 3:
    - Nobushi: Kikouban ×2
    - Treasure Hoarders: Crusher ×1
    - Treasure Hoarders: Seaman ×1
Starting location

Ardravi Valley

Southwest of Devantaka Mountain
- Challenge Target: Defeat 9 monster(s)
- This variant includes Pyro Boom Blossoms and Pyro Exploding Barrels near the monolith.
- Enemies:
  - Wave 1:
    - Eremite Daythunder ×1
    - Eremite Ravenbeak Halberdier ×2
  - Wave 2:
    - Eremite Axe Vanguard ×1
    - Eremite Crossbow ×2
  - Wave 3:
    - Eremite Linebreaker ×1
    - Eremite Crossbow ×2
Starting location

Avidya Forest

West of Gandharva Ville
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1:
    - Eremite Sword-Dancer ×2
    - Eremite Crossbow ×2
  - Wave 2:
    - Eremite Axe Vanguard ×2
    - Eremite Ravenbeak Halberdier ×2
  - Wave 3:
    - Eremite Daythunder ×1
    - Eremite Crossbow ×2
Starting location

Hypostyle Desert

Southeast of The Mausoleum of King Deshret
- Challenge Target: Defeat 9 monster(s)
- Enemies:
  - Wave 1:
    - Eremite Daythunder ×1
    - Eremite Axe Vanguard ×2
  - Wave 2:
    - Eremite Axe Vanguard ×1
    - Eremite Crossbow ×2
  - Wave 3:
    - Eremite Linebreaker ×1
    - Eremite Crossbow ×2
Starting location

Land of Lower Setekh

Southwest of the Teleport Waypoint directly west of the Eye of the Sands
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1:
    - Eremite Crossbow ×2
    - Eremite Linebreaker ×2
  - Wave 2:
    - Eremite Ravenbeak Halberdier ×2
    - Eremite Sword-Dancer ×2
  - Wave 3:
    - Eremite Crossbow ×2
    - Eremite Desert Clearwater ×1
Starting location

Desert of Hadramaveth

Next to the Teleport Waypoint overlooking the rift
- Challenge Target: Defeat 9 monster(s)
- Enemies:
  - Wave 1:
    - Eremite Axe Vanguard ×1
    - Eremite Ravenbeak Halberdier ×2
  - Wave 2:
    - Eremite Linebreaker ×1
    - Eremite Axe Vanguard ×1
    - Eremite Crossbow ×2
  - Wave 3:
    - Eremite Axe Vanguard ×1
    - Eremite Ravenbeak Halberdier ×1
Starting location

Vissudha Field

Near the Teleport Waypoint directly west of the Statue of The Seven
- Challenge Target: Defeat 11 monster(s)
- Enemies:
  - Wave 1:
    - Eremite Crossbow ×2
    - Eremite Linebreaker ×2
  - Wave 2:
    - Eremite Ravenbeak Halberdier ×2
    - Eremite Sword-Dancer ×2
  - Wave 3:
    - Eremite Crossbow ×2
    - Eremite Desert Clearwater ×1
Starting location

Other Languages

Language	Official Name	Literal Meaning
English	Impregnable Defense	—
Chinese (Simplified)	固若金汤 Gù Ruò Jīn Tāng	Strongly Fortified^{[• 1]}
Chinese (Traditional)	固若金湯 Gù Ruò Jīn Tāng	Strongly Fortified^{[• 1]}
Japanese	金城湯池 Kinjou Douchi	Impregnable Fortress
Korean	난공불락 Nangongbullak	Impregnability
Spanish	La mejor de las defensas	The Best of the Defenses
French	Mur d'airain	Cast-Iron Wall
Russian	Неприступная оборона Nepristupnaya oborona	Impregnable Defense
Thai	การป้องกันสุดแกร่ง	Sturdy Defense
Vietnamese	Vững như bàn thạch
German	Uneinnehmbare Festung	Impregnable Stronghold
Indonesian	Pertahanan yang Kokoh	Sturdy Defense
Portuguese	A Melhor das Defesas
Turkish	Yenilmez Savunma	Undefeatable Defense
Italian	Difesa impenetrabile	Impenetrable Defense