Facing Arch-Tempered Rey Dau in Monster Hunter Wilds is a true test of skill and preparation. This electrifying wyvern, an enhanced version of its base form, brings amplified power, new attack patterns, and heightened aggression. To conquer this formidable foe, hunters must strategize meticulously, equip themselves appropriately, and remain vigilant throughout the battle.

Arch-Tempered monsters are elite variants, boasting increased health, damage output, and resistance to certain tactics. Rey Dau, already a thunder-infused menace, becomes even more unpredictable and lethal in this form. Expect new attack sequences, reduced susceptibility to Flash Pods, and an overall more challenging encounter.
Preparation: Gear and Items
Weapons
Rey Dau’s primary weakness lies in the Ice element, with Water as a secondary vulnerability. Equipping weapons that exploit these weaknesses is crucial. Consider the following options:
- Frost Blade (Long Sword): Offers swift, precise strikes with elemental damage.
- Blizzard Hammer (Hammer): Delivers powerful blunt attacks, effective for stunning.
- Glacial Bow (Bow): Allows for ranged assaults, keeping you at a safer distance.
If Ice weapons are unavailable, Water-based alternatives like the Tsunami Edge (Dual Blades) or Aqua Lance (Lance) can serve as substitutes.
Armor
Given Rey Dau’s thunderous arsenal, armor with high Thunder Resistance is essential. Prioritize sets that offer:
- Thunder Resistance: Mitigates damage from electric attacks.
- Stun Resistance: Reduces the duration and frequency of stuns.
- Divine Blessing: Provides a chance to lessen damage taken.
The Guardian Arkveld or Kirin Armor Sets are commendable choices for their balanced defense and elemental resistances.
Essential Items
Stock your inventory with the following:
- Mega Potions: For substantial health recovery.
- Nulberries: To cure Thunderblight status.
- Flash Pods: Useful for grounding Rey Dau during flight, though effectiveness diminishes after multiple uses.
- Pitfall Traps: Effective for immobilizing Rey Dau, especially since it’s resistant to Shock Traps.
- Dash Juice: Maintains stamina during prolonged engagements.
- Well-done Steak or Rations: Ensures stamina remains at optimal levels.
Combat Strategy
Targeting Weak Points
Rey Dau’s vulnerabilities include:
- Head: Highly susceptible to damage; breaking the horns can interrupt certain attacks.
- Wings: Damaging these can hinder its aerial maneuvers.
- Tail: Severing it reduces the range of tail-based attacks.
Utilize Focus Mode to identify and exploit these weak points effectively.
Recognizing Attack Patterns
Rey Dau employs a mix of ground and aerial assaults, often signaled by specific movements:
- Lightning Beam: When its horns glow and it rears back, prepare to dodge a powerful beam.
- Wing Slams: A downward thrust of its wings indicates an impending slam attack.
- Tail Swipes: A lifted tail suggests a sweeping attack; maintain distance or sidestep accordingly.
After executing certain attacks, Rey Dau’s head becomes momentarily vulnerable. Seize this opportunity to inflict significant damage.
Managing Thunderblight
This status ailment increases susceptibility to stuns. To counteract:
- Evade Continuously: Movement can help dissipate the effect over time.
- Consume Nulberries: Instantly cures Thunderblight, restoring normal resistance levels.
Utilizing the Environment
The Windward Plains offer environmental aids:
- Falling Boulders: Lure Rey Dau beneath these and trigger them to cause substantial damage.
- Vine Traps: Lead the monster into these natural snares to immobilize it briefly.
- Grounding Pillars: Use these to stagger Rey Dau during its charging phase.
In Area 17, be cautious of fulgurite rocks that emit electric shocks when disturbed. Maintain mobility to avoid additional damage.
Advanced Tactics
Weapon Swapping
If proficient, consider alternating between melee and ranged weapons. For instance, switch to a bow when Rey Dau takes flight to maintain offensive pressure.
Seikret Mount
Your Seikret mount can be invaluable for:
- Quick Repositioning: Evade attacks or chase the monster efficiently.
- Safe Healing: Create distance to recover health without immediate threat.
- Maintaining Stamina: Avoid overexertion by riding instead of sprinting.
Final Phase: The Nest Encounter
As Rey Dau’s health wanes, it retreats to its nest in Area 17. This locale is fraught with hazards, including explosive ground reactions to its attacks. Exercise heightened caution here.
Before re-engaging:
- Heal and Restock: Ensure you’re at full health and have necessary items.
- Sharpen Weapons: Maintain optimal weapon effectiveness.
- Set Traps: Position a Pitfall Trap strategically to capitalize on Rey Dau’s weakened state.
Upon its return, Rey Dau may enter an enraged state. Continue targeting its weak points, and with persistence, you’ll emerge victorious.
Rewards
Defeating Arch-Tempered Rey Dau yields exclusive materials essential for crafting the Gamma variant of its armor set. This gear offers unique aesthetics and enhanced stats, serving as a testament to your triumph over one of the game’s most formidable adversaries.
In conclusion, conquering Arch-Tempered Rey Dau demands preparation, adaptability, and keen observation. By understanding its patterns, exploiting its weaknesses, and utilizing the environment, you can overcome this electrifying challenge.