The Knuckle Duckle is a unique World Boss in Genshin Impact's Luna I update, featuring a shield mechanic requiring Electro-Charged reactions to defeat 5 Duck minions. Success demands specific team compositions and drops essential ascension materials for new characters.
Finding Your Target: Knuckle Duckle Location & Stats
Here's what you're up against. The Knuckle Duckle rolled into Version 6.0 on September 10, 2025, packing a hefty 5,615,327 HP and dealing 14,773 ATK damage. Not exactly a pushover.
You'll find this mechanical menace tucked away in the Nod-Krai region—specifically inside a cave that sits south of the Clink-Clank Krumkake Craftshop. (Yes, that's actually what they named it.) Getting there's pretty straightforward: head northwest from Nasha Town and follow the road. Aino designed this boss, which explains why it's both ingenious and slightly unhinged.
The payoff? Exclusive ascension materials and some genuinely cool cosmetic rewards that you can't get anywhere else.
The Shield System That Changes Everything
This isn't your typical hit it until it dies boss fight. The Knuckle Duckle operates on a completely different rulebook.
In its normal state, the boss maintains 10% resistance to all elements—manageable enough. But once that shield activates? We're talking 80% resistance to everything you throw at it. That's when the real mechanics kick in.
The boss summons five Duck minions, each with their own resistance profile: 10% to Electro, 90% to Hydro, and a whopping 150% to everything else. Here's the kicker—each Duck needs exactly 10 Electro-Charged or Lunar-Charged reaction hits to go down. Not damage. Reactions.
Every defeated Duck chips away 5% of the boss's HP and brings you closer to breaking that shield. Clear all five? The shield drops, resistances plummet back to 10%, and you've got your damage window.
Watch for purple radar splash indicators and straight-line charge attacks. The telegraphs are generous, but the damage isn't forgiving if you're caught off-guard.
Team Compositions That Actually Work
After extensive testing (and more failed attempts than I care to admit), these setups consistently deliver results:
The Flins Powerhouse
Main DPS: Flins (Electro Polearm)
Sub DPS: Ineffa
Support: Yelan (Hydro application)
Support: Kokomi (Hydro + healing)
This is the gold standard. Flins brings both the damage and the materials he needs from this fight—talk about efficiency.
Ineffa Alternative Route
Main DPS: Tartaglia
Sub DPS: Ineffa
Support: Furina
Support: Ororon
Solid choice if you're building around Ineffa or don't have Flins yet.
Old Reliable: Traditional Electro-Charged
Main DPS: Raiden Shogun
Support: Kazuha
Support: Yelan
Support: Furina
Don't sleep on the classics. This team might not have the new Lunar reactions, but it gets the job done with characters most players already have built.
The Four-Phase Battle Plan
Phase 1: Standard engagement. Deal damage while dodging those purple telegraphs—they hurt more than they look like they should.
Phase 2: This is where most teams fall apart. Focus exclusively on the Duck minions. You need 50 total reaction hits (10 per Duck × 5). Ignore the main boss completely—that 80% resistance makes it a waste of time and energy.
Phase 3: Vulnerability window. This is your moment. Unleash everything you've got while the boss is stunned and resistances are down.
Phase 4: Rinse and repeat.
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What You're Fighting For: Rewards & Materials
The big prize here is the Precision Kuuvahki Stamping Die—essential for ascending Flins and Aino.
You'll only get this from Level 30+ encounters, so make sure you're not farming at lower world levels.
Standard drops include the usual suspects: Vajrada Amethyst materials, artifact sets (Gladiator's Finale, Wanderer's Troupe, and the lower-tier sets), Adventure EXP, Mora, and Companionship EXP. Nothing groundbreaking, but solid farming nonetheless.
The Cosmetic Shop: A Pleasant Surprise
Here's something different. Your first boss clear unlocks an exclusive cosmetic shop featuring items for Aino and Ineffa. The catch? You'll need specific friendship levels and some Nod-Krai chest hunting to access everything.
There's also a neat alternative: interact directly with the boss machine for special dialogue and cosmetic rewards. It's a small touch, but these details make the content feel more integrated into the world.
Farming Optimization: Speed Over Power
This might sound counterintuitive, but raw damage means nothing here. It's all about reaction application speed.
Teams that can quickly apply those 50 reaction hits will consistently outperform high-damage setups that struggle with elemental application. Prioritize Elemental Mastery substats and characters with fast, consistent elemental application rates.
Save your burst abilities for the vulnerability windows. Using them during shield phases is like throwing Primogems into a fire.
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Mistakes That'll Cost You Time
I've watched countless players make these same errors:
Attacking the shielded boss (you're literally fighting 80% resistance). Trying to brute-force the Ducks with raw damage (150% resistance to most elements says no). Running teams without proper Electro/Hydro synergy. Wasting burst rotations during shield phases instead of saving them for vulnerability windows.
Learn from others' mistakes. Your Resin will thank you.
Character Synergies Worth Noting
Flins offers the perfect synergy loop—he's both your optimal DPS and the character who needs the materials you're farming. Ineffa enables smooth reactions while benefiting from the cosmetic rewards.
Don't feel pressured to pull for new characters, though. Traditional options like Raiden, Yelan, and Furina remain highly viable through consistent elemental application. The new Lunar reaction system showcases Version 6.0's mechanics nicely, but it's not mandatory for success.
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Timeline & Availability
This permanent boss launched during the 5th Anniversary Luna I update. Phase 1 Banners run September 10 - October 1, 2025, followed by Phase 2 from October 1 - October 22, 2025. Anniversary rewards drop on September 28, 2025.
The good news? No time restrictions on farming. This boss isn't going anywhere.
Your Most Pressing Questions, Answered
How many hits actually defeat the Duck minions? Exactly 10 Electro-Charged or Lunar-Charged reaction hits per Duck. Raw damage won't cut it due to that 150% resistance wall.
Which characters absolutely need Knuckle Duckle materials? Flins (5-star Electro Polearm) and Aino (4-star Hydro Claymore) both require Precision Kuuvahki Stamping Die from Level 30+ encounters. No alternatives exist.
Can I get cosmetics without grinding the boss repeatedly? The shop unlocks after your first victory, but items require friendship levels and Nod-Krai chest discovery. The boss machine interaction offers an alternative route that's worth exploring.
What's the most efficient farming team? Lunar-Charged teams featuring Flins + Ineffa + Hydro supports achieve the fastest clear times. Traditional Electro-Charged setups with Raiden + Yelan + Furina remain highly effective for most players.
What exactly happens during the vulnerability phase? Once all five Ducks are down, the boss enters a stun state and resistances drop from 80% to 10%. This is your critical damage window—make it count with your best burst rotations.
How does this compare to other World Bosses in terms of difficulty? Mechanically, it's actually easier once you understand the system. The challenge lies in team composition and reaction management rather than raw mechanical skill. Raw damage teams will struggle, but reaction-focused teams find it surprisingly straightforward.