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As Genshin Impact's Natlan Archon Quest approaches its conclusion, both the narrative and combat systems continue to evolve. Each region features two weekly bosses, and the Lord of Eroded Primal Fire stands out as particularly challenging—potentially surpassing previous encounters in difficulty.
This massive dual-wielding dragon embodies the primordial ruler of Natlan, with Gosoythoth's corrupted appearance amplifying its threat level. The boss showcases clear Abyssal influences, employing mechanics similar to Inazuma's Riftwolves through its Corrosion effects. While demanding, this encounter remains achievable with proper strategy. Here's a comprehensive guide to overcoming the Lord of Eroded Primal Fire.
Locating the Lord of Eroded Primal Fire in Genshin Impact

You'll find the Lord of Eroded Primal Fire at Stone Stele Records, a domain situated south of the Statue of Seven near the Masters of the Night-Wind tribe. This shrine commemorates those lost during Natlan's historic battles. Entering the domain allows you to claim standard rewards using 30 Original Resin for your first three weekly boss clears.
To access this boss freely, complete the final chapter of the Archon Quest: When All Becomes A Monument. Alternatively, use the Quick Challenge feature in the Adventurer's Handbook to bypass story requirements.
Defeating the Lord of Eroded Primal Fire in Genshin Impact

Success in this encounter relies heavily on utilizing regional characters from Natlan, such as Mavuika, Kinich, Citlali, and Mualani.
Though the boss remains relatively stationary initially, it eventually summons three Pillars and three Tenebrous Mimiflora. Characters with Nightsoul Blessings prove most effective against these constructs.
Destroy the Three Pillars Using Nightsoul Blessing

While other characters can theoretically destroy the Pillars, the process becomes significantly slower. Natlan characters like Mavuika, Citlali, Kinich, or Kachina break the shields more efficiently, allowing you to interrupt the Dragon's Eroded Meteor strike. Shattering the pillars immobilizes the Dragon for approximately 10 seconds, creating a crucial damage window.
If pillar destruction progresses too slowly, prepare for the meteor animation by activating shields and switching to healers. Despite shielding, Corrosion damage penetrates defenses, requiring consistent healing to survive. Unshielded characters risk instant defeat even at full health.
Reliable healers like Furina and Kokomi excel here, though Kuki, Barbara, and Bennett serve as effective alternatives.
Evade Attacks or Position Underneath the Dragon

This battle demands constant awareness, as the dragon's erratic attack patterns complicate evasion. During certain phases, it transforms into smoke and moves rapidly around the arena, making its next actions difficult to predict. Its frenzied assault patterns include sword slashes and smashes that progressively destroy portions of the battlefield.
As the fighting area shrinks, maneuverability decreases significantly. Given the boss's substantial health pool, encounters reaching this stage may prolong considerably. Remaining underneath the dragon while dealing damage presents one viable strategy, though you'll need sustained healing to counteract Corrosion from its Eroded Dragon Breath attack.
This particular attack involves the Dragon impaling both swords into the ground, unleashing Pyro and Erosion damage. Maintain both shielding and healing simultaneously during this phase. If overwhelmed, retreat toward the dragon's hands where the breath attack cannot reach. Quick healing remains essential after any sword slash connects to neutralize accumulating Erosion effects.
A reliable healer is indispensable for this encounter—ensure your team includes one.
Co-Op Mode and Matchmaking

Co-Op Mode provides an alternative approach regardless of your character roster. Additional players using Nightsoul Blessing characters significantly ease the Pillar destruction phase. Simply select the 'Match' button upon entering the Domain to join other players' worlds for collaborative boss battles.
Fortunately, this encounter features a single phase compared to multi-stage weekly bosses, though it still requires substantial time and coordination to complete.