MHW Arch-Tempered Rey Dau

The arrival of MHW Arch-Tempered Rey Dau sets a new benchmark for challenge content. This upgraded version of the lightning-wielding apex serpent combines brutal speed, elemental power, and a redesigned move set designed to punish every misstep. Veterans of the base version will need to completely rethink their approach — this fight is longer, harder, and more technical.

In this guide, we’ll cover everything you need to take her down, including how to unlock the fight, the best builds to use, a full breakdown of her attacks and weaknesses, and the exclusive rewards you’ll earn for your victory.

Best Builds & Weapon Recommendations

🛡️ Defensive Build

This setup is optimized for survivability against MHW Rey Dau’s chain attacks and thunder AoE. Ideal for solo or first-time hunters.

Armor Set: Numinous Crown β, Numinous Shroud α, Xu Wu Vambraces β, Numinous Overlay β, Numinous Greaves α
Key Jewels: Thunder Res Jewel (x4), Mighty Jewel (x3), Recovery/Medicine, Earplugs, Chain
Charm: Blessing Charm III – offers survival chances during one-shots
Focus: Thunder resistance, damage reduction, passive healing, and stagger immunity

⚔️ Offensive Build

A high-damage option for experienced players who know Rey Dau’s timing and can avoid hits. Works well with support teammates or aggressive openings.

Armor Set: Numinous Crown β, Numinous Shroud β, G. Arkveld Vambraces β, Gore Coil β, Gore Greaves β
Key Jewels: Thunder Res Jewel (x3), Mighty Jewel (x4), Challenger Jewel (x2), Sane Jewel, Chain Jewel
Charm: Exploiter Charm II – increases damage against weak zones
Focus: Max DPS with moderate Thunder resistance and affinity stacking

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🗡️ Best Weapons to Use

Weapon	Why It Works
Great Sword	Strong follow-up after guarding; ideal for punishing her downtime.
Sword and Shield	Balanced mobility and defense; quick guard reactions vs tail slams.
Lance	Can block most ground attacks and stay close to punish windows.
Gunlance	Excellent at poking from safety after guarding AoEs.
Charge Blade	Strong combos and guard potential; great for quick burst punishes.
Bow	Excellent for mobility and spacing; perfect dodge setups vs tail coils.

Tip: Regardless of weapon, ensure you have at least Thunder Res Level 3 and decorations that help with stamina or guarding. MHW Rey Dau’s magnetic field mechanics often reposition players unexpectedly — adaptability is key.

Attack Patterns & Special Moves

Arch-Tempered Rey Dau combines her High Rank techniques with deadly new variations and enhanced damage effects. Most of her signature moves now leave behind residual thunder trails or emit blue lightning bursts that detonate after a delay. Below is a breakdown of her major attacks and how to counter each one effectively:

Attack	Description
Downwards Lightning Beam	Rey Dau charges energy through her horns and fires a railgun-like beam downward. Often followed by aerial movement and a second lightning strike or wing slam.
Supercharged Lightning Beam	Appears when her spine and horns glow brightly. Shoots a massive forward lightning wave after a short charge. Dodge to the side, then counterattack.
Flip Slam	Performs a backflip and slams one wing into the ground. Leaves her briefly open to melee attacks right after the slam lands.
Lightning Beam	Standard forward lightning shot. Often chained twice in a row with a delayed second strike. Run diagonally to evade both.
Quickfire Beam	Shoots multiple beams in rapid succession. Best avoided by constantly circling her in a zigzag motion while locked on.
Flying Wing Drag	She takes to the air and drags a wing across the field. Dodge perpendicular to the wing’s path or use a Flash Pod to bring her down.
Heavy Tail Slam	Raises her tail vertically before smashing it into the ground. Avoid by rolling under her or hugging her front legs closely.
Double Tail Slam	Sweeps her tail in both directions — left then right. Backstep away or roll under her body depending on your position.
Wing Slam	MHW Rey Dau slams one of her wings directly down after a short animation wind-up. Move back or to the opposite side to avoid.
Grounded Wing Drag	She scrapes a wing across the terrain while grounded. Stay near her legs or dodge-roll backward if farther away.
Horn Thrust	Charges forward with lowered horns. Roll sideways or use I-frames to avoid the direct hitbox.

Note: Most beam attacks leave behind temporary electric zones. Stay alert for lingering effects even after the animation finishes.

MHW Arch-Tempered Rey Dau Weakness

Arch-Tempered Rey Dau may have enhanced defenses and modified resistances, but she still retains some exploitable weak points. Understanding where to focus your damage and what elements to bring can dramatically increase your survival and kill speed.

🧠 Weak Points by Body Part

Head: Extremely weak to Ice and Blast. Targeting this area can interrupt her charged attacks and eventually stagger her.
Wings: Weak to Blast damage and Blunt weapons. Great for interrupting aerial combos and beam setups.
Tail: Susceptible to Water and Cutting damage. Severing the tail disables some slam patterns and reduces AoE threat range.

💥 Best Elements

Ice (⭐⭐⭐): The most effective element, especially when used on her head or tail. Slows charge-up animations and boosts flinch frequency.
Water (⭐⭐): Good backup element; helps weaken magnetic field surges and tail slams.
Blast (⭐⭐): Great for breaking wings and setting up DPS windows. Becomes more valuable in multiplayer hunts.

⚠️ Elemental Resistances

Thunder: Fully resistant — do not bring thunder weapons under any circumstance.
Fire: Minimal effect — very little damage output gain even with full buffs.
Dragon: Weakest performance unless using Elderseal-based disruption builds.

Tip: Equip Thunder Resistance to survive, but bring Ice-based weapons to finish the job. Aim for the head during openings, and use Blast builds in groups to break wings faster.

MHW Arch-Tempered Rey Dau Drops and Rewards

Completing the Arch-Tempered Rey Dau Event Quest grants exclusive access to rare materials, most notably the Rey Dau Certificate γ. This is a unique reward required to unlock special armor sets and charms not available elsewhere:

Rey Dau γ Set
Felyne Rey Dau γ Set
Defense Charm V and Power Charm III

🎯 High Rank Target Rewards

Rey Dau Carapace: 22%
Rey Dau Scale+: 22%
Rey Dau Tail: 11%
Rey Dau Bolthorn: 11%
Rey Dau Plate: 7%
Rey Dau Fulgurtalon: 16%
Rey Dau Boltgem: 3%
Rey Dau Certificate S: 8%

🦴 Carve Rewards

Rey Dau Tail: 93% (Tail), 11% (Body)
Rey Dau Carapace: 23% (Body)
Rey Dau Scale+: 30% (Body)
Rey Dau Bolthorn: 13% (Body)
Rey Dau Boltgem: 7% (Tail), 5% (Body)
Rey Dau Fulgurtalon: 18% (Body)

🪓 Broken Parts Rewards

Thunderhorn: 100% (Horn Break)
Wingtalon: 100% (Left Wing), 100% (Right Wing)

💥 Wound Destroy Rewards

Rey Dau Carapace: 50%
Rey Dau Scale+: 50%

Tip: For optimal farming, break both wings and the horn during the fight, then target the tail to maximize part-specific rewards. Using Partbreaker and Capture Master greatly increases material gain per run.

Conclusion

Facing Arch-Tempered Rey Dau is no ordinary hunt — it’s a test of reflexes, preparation, and adaptability. Her enhanced attack set, elemental surges, and terrain-manipulating tactics will punish any lapse in awareness. Whether you're going in solo with a heavy shield build or coordinating part breaks in a four-player run, proper loadouts and elemental counters are vital.

By leveraging Ice-based weapons, maintaining Thunder resistance, and targeting key body parts like the head and wings, hunters can tame this apex serpent and walk away with some of the most valuable materials in Monster Hunter Wilds. You can speed up your gear progression and clear challenging hunts like Arch-Tempered Rey Dau with trusted Monster Hunter Wilds Boosting Services — ideal for unlocking rare materials and exclusive armor sets without the grind.

With the help of this guide, you're well equipped to grind for her rare rewards and unlock exclusive armor and charms — good luck out there!

FAQ

Where do I unlock the Arch-Tempered Rey Dau quest?

It becomes available after completing the Elder Hunt storyline and defeating standard MHW Rey Dau. Look for the 9★ Event Quest “The Crown’s Coil”.

What’s the best element against Rey Dau?

Ice is the most effective, followed by Water. Avoid using Thunder and Fire weapons.

What’s the rarest drop?

Rey Dau Certificate γ is the exclusive drop tied to this version and used to craft the γ armor and charms. The rarest standard material is the Rey Dau Boltgem.

Can I return to camp during the fight?

No — the quest disables mid-hunt camp access. Bring Farcasters, Mega Potions, and Nullberries before entering.

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Change Log

27.05.2025 - MHW Arch-Tempered Rey Dau published.

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