Monster Hunter WildsRey Dau Guide - Weaknesses, Location, Armor & More

Rey Dau is a new Flying Wyvern in Monster Hunter Wilds. It is the apex monster of the Windward Plains, and uses the thunders during the Sandtide to power himself up, unleashing devastating lighting attacks along with attacks from its wings and tail.

In this guide, we'll cover Rey Dau's location, core mechanics, and more to make sure you're ready for your fight against it.

This guide is written by @dxvis.

Rey Dau can be found in the Windward Plains during the Sandtide weather event. It will roam across the Plains and Desert areas.

Its nest is covered in Fulgurite, a metal that conducts electricity. Natural lightning bolts and Rey Dau’s electric attacks will trigger an Area of Effect explosion around where they hit, unless Hunters use a Grounding Pod to set off electricity in the area.

Since most of Rey Dau’s attacks deal Thunder elemental damage, eating meals that boost Thunder Resistance will notoriously help. Equipping the Thunder Resistance Skill will help with reducing thunder damage, too.

Since Rey Dau spends a decent amount of time in the air, Hunters can use Flash Pod to bring him down regularly.

When it is not powered by electricity, Rey Dau mostly uses physical attacks. These attacks are precise and swift, and dodging is a valid strategy against most of them, especially if you’re able to dodge below it, as its attacks do not have hitboxes there.

Like other high-tier monsters, Rey Dau can chain two, or even three attacks together, especially when it’s enraged. Be on the lookout for sudden attacks.

Its physical attacks include the usual tackles and tail swings common among Flying Wyverns. However, Rey Dau makes use of its wings to attack, too. 

Ground Wing Drag

While on the ground, Rey Dau can drag one of its wings across the ground, both forward and to the side. The side-to-side attack doesn’t hit hard, but is very quick. The forward attack hits harder but can be easily seen coming.

Ground Wing Slam

It can also prepare a wing slam by slowly moving it up. This move is easy to read, but hits hard, so Hunters should disengage when they see it coming.

Backflip Wing Attack

One of Rey Dau’s signature attacks is his aerial wing slam after a backflip. It will suddenly leap into the air, and crash down after doing a backflip, slamming one of its wings forward. Focus on his movement and orientation to see which side the attack will come from, and move to the other side.

Wing Dragging Attack

Rey Dau can also drag his wing across a large distance while in the air. Rey Dau can aim this attack and follow Hunters to a certain degree, so dodge out of the way when it’s about to hit. This attack can also be offset.

After dragging his wings across the ground, Rey Dau will cover them with blue Fulgurite. This will increase the damage of its wing slams, so be careful. You can attack its wings to destroy the Fulgurite shell.

Thunder Blast

Aside from the usual enraged state, Rey Dau can also power itself up with electricity. This happens more often while under a thunderstorm and whenever a lightning bolt hits it. In this state, its horns and tail will spark with electricity, and it can unleash thunder blasts from its horns.

These thunder blasts can happen in a variety of ways: From the ground, after a sudden leap in the air, or even after another attack. Be on the lookout for audio cues, as Rey Dau will emit a specific sound and you will also be able to hear electricity sound effects. 

After some of these thunder blasts, it will open up its horns so they cool down, allowing for a temporary Focus Strike.

Ultimate Thunder Blast

Rey Dau’s ultimate move happens when it charges up with electricity while it’s enraged and in its powered-up state. The whole screen will become darker, and he will unleash an even more devastating version of its thunder blast. This move can one-hit K.O., so run away from it and into Rey Dau, as it will be exposed afterward.

It is possible to knock Rey Dau out of his charged state by repeatedly hitting the body parts that glow with electricity, resulting in a knockdown.

Nest

The hardest part of Rey Dau’s fight happens when he moves onto its nest. The floor there is made out of Fulgurite, which conducts electricity. Rey Dau’s electric attacks will cause an Area of Effect explosion after a brief delay, making the fight significantly more difficult. 

Using the Falling Grounding Rock in the ceiling, or the Grounding Pods in the area, will dispel electricity around where they hit, and temporarily knock Rey Dau out of its charged state.

• Body Weak Points: Head
• Severable Points: Tail
• Breakable Points: Head, Wings

When not charged, Rey Dau's head, horns, and tail are its weakest points. However, when charged with electricity, the body parts that glow with electricity take more damage.,

Its horns and wings are breakable, and its tail can be severed.

Rey Dau’s electric blasts deal tremendous damage to other monsters, and it won’t hesitate to use them on sight. Only apex-tier monsters can put up a fight against Rey Dau.

Rey Dau has a unique Turf War animation with Arkveld.

Since Gypceros is not an apex monster, it will be significantly damaged if it confronts stronger monsters like Rey Dau.

Rey Dau's Set Bonus is Rey Dau's Voltage = Thunderous Roar I / Thunderous Roar II which extends the activation time of the Latent Power skill.