Monster Hunter Wildshas its fair share of intimidating monsters, including Rey Dau, a massive winged wyvern that uses lightning to beat back ambitious hunters. This beast is a challenging foe, with thunderous strikes and explosive attacks that can wipe out your character instantly. However, by analyzing this creature’s patterns, you may be able to find a few weaknesses you’re able to exploit.
While you may be able to encounter a Rey Dau from exploring your map, you’ll face this monster eventually by progressing through main story quests. Defeating the likes of Alpha Doshaguma inMonster Hunter Wildswill put you on track to face Rey Dau after a few more missions.Take the time to farm good parts for stronger gearto help prepare you for this battle.

Where To Find Rey Dau
Wait Until Lightning Strikes
Rey Dau either appears naturally in the game’s story orin the Windward Plains when lightning storms take place in the biome. The inclement weather is anew feature ofMonster Hunter Wilds, causing different locations to have shifting weather patterns over time. Rey Dau comes out to hunt various prey when storms are heavy, casting darkness across the Plains along with occasional strikes of lightning.
you may check the weather status of a region by going to the"Forecast"section of the"Environment Overview"menu associated with your map.

Thankfully, you don’t always have to wait for the right weather to face a Rey Dau. Once you beat this creature once in the story, you canchallenge it again at any time by scheduling a hunt with Alma. This will automatically change the weather of the Plains to resemble when Rey Dau spawns on the biome’s map.
How To Defeat Rey Dau (Phase 1)
Avoid Lightning Strikes And Look For Weak Points
Rey Dau is a Winged Wyvern capable of inflicting Thunder damage to you and your allies, so one step you can take to beat it is towear gear that gives you Thunder Resistance skills. Some armor or equipment will allow you to reduce the elemental damage from Rey Dau’s attacks, giving you more chances to survive during a fight.
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A Rey Dauhas three separate weak points you should targetto deal extra damage, including its:

Slicing off a monster’s tail gives you another area of the creature to carve, giving you extra materials for unique gear if you manage to sever that part by doing multiple slashing attacks on it.
When fighting a Rey Dau, thismonster inMonster Hunter Wildswill use its wings like swords, slashing at your character to deal damage.Rey Dau gathers lightning in its horns and wings to unleash powerful attackssupercharged with Thunder damage. The table below outlines Rey Dau’s most dangerous attacks, as well as how you can counter them:

How To Counter
Lightning Beam
Rey Dau closes its horns around its head before firing a bolt of lightning toward your character.
The ground next to you will glow blue before Rey Dau releases the fast bolt of lightning, so roll away to avoid taking damage.

Winged Slash
Raising one wing, the Rey Dau drags it across the ground, leaving a small trail of electricity while trying to hit a hunter.
Some weapons can counter this attack or block it if it has a shield. Alternatively, you can dodge by rolling to Rey Dau’s other side to avoid this attack.

Horn Thrust
Rey Dau closes its horns before stabbing forward with a headbutt attack.
Simply block, counter, or dodge this attack using your weapon’s unique properties.

Leaping Slam
When hunters are behind Rey Dau, it may leap into the air before slamming down to the ground to deal damage in a small AoE of Thunder.
Dodge forward or block this attack to avoid taking damage.

Supercharge Railcannon
Rey Dau closes its horns before the spines on its neck begin to glow. After a short time, the Rey Dau will fire a large beam of lightning that causes a large AoE explosion of Thunder damage.
Watch for when Rey Dau plants its wings into the ground to charge this attack. Then, move as far to the right or left from the monster’s head as you can to get away from the AoE.

Rey Dau’s largest attacks leave it vulnerableto be countered by your weapon’s strikes. For example, after doing a Supercharge Railcannon, Rey Dau takes a long time to recover as the vents in its neck exhaust steam from the channeled lightning.
Your attacks against Rey Dau could cause it to gain an injury through an Open Wound. You can deal extra damage to a monster by identifying its Open Wound through Focus Mode, then targeting those weak points with unique Focus Strike attacks with your weapon. Enough damage to an Open Wound will destroy it, causing some monsters to get staggered.

Many of Rey Dau’s attacks can also be performed while the creature is flying in the air. This can be frustrating, as many attacks with melee weapons can’t reach a flying Rey Dau at times. However, you canuse a Flashpod in your Slingeroractivate environmental trapsto knock Rey Dau out of the sky, staggering it and giving you the perfect chance to deal some incredible damage.
How To Defeat Rey Dau (Phase 2)
Track The Monster Back To Its Lair
When you injure Rey Dau enough, it will retreat back to its resting place by flying away from the fight. You have totrack down the Rey Dau back to its nest using Scoutfliesor by following the location of the monster on your map. When you confront Rey Dau for the last time, the creature’s attacks are buffed to have more properties than before.
For starters,Rey Dau’s attacks now cause a delayed explosion of Thunder damagewherever they hit. For example, the Winged Slash attack now causes the ground underneath where a wing struck to glow with lightning. This space then explodes into a burst of electricity, punishing players whomake the mistake inMonster Hunter Wildsto keep aggressively attacking Rey Dau as they recover from using a move.
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Like all hunts, youhave a limited time to defeat Rey Dau, so attempt to implement every strategy at your disposal to end the hunt fast. Once you kill a Rey Dau during a quest, you’ll have around 30 seconds to carve whatever parts are left of the creature for your main rewards.
Rewards From Beating Rey Dau
Gain Unique Parts For New Gear
Defeating Rey Dau will reward you withvarious parts carved from any sections of the monster you broke. Cutting off the Rey Dau’s tail during a hunt will yield extra items, while even more materials will drop if you break the horns on its head. Destroying Open Wounds in Focus Mode will also give you more parts, so try to target every weak point Rey Dau has for the most rewards.
Some of the materials you could get from a successful Rey Dau hunt are:
The Rey Dau Boltgem is the rarest reward for taking down this monster, but all the parts you get from carving this creature upcan help you craft new weapons and armor. Those who beat Rey Dau inMonster Hunter Wildsare likely to unlock recipes for gear that give them Thunder Attack or Resistance, alongside other unique skills tied to the Winged Wyvern.