Rey Dau is a large bipedal wyvern covered in bony golden scales, as well as smaller black scales on its underbelly, joints, and wings. Unlike most other bipedal Flying Wyverns, its wings are not comprised of extended digits, instead being a single membrane similar to that of pterosaurs. Its wings additionally have bladed protrusions which are used as weapons. It has a short and vaguely serpentine head with a facial structure similar to Nergigante, with two rows of teeth and a pair of mandible-like protrusions on either side of its jaw, while its neck has two slits that extrude glowing blue, fin-like structures whenever it is focusing electricity. Its defining features are the large horns spread out on each side of its head; the horns on its head can be folded inwards and used to channel electricity akin to a rail gun. After harnessing electricity, its wing blades and back spikes glow bright blue with fulgurite. Behavior and Abilities Rey Dau is the apex predator of the Windward Plains. It has great control over lightning, appearing during thunderstorms and using the electricity in the air to channel, charge and fire massive blasts of lightning from its horns. After blasting lightning, the sand on its wings crystallizes into sharp blades of fulgurite crystal, enhancing its attacks. Rey Dau can additionally charge its horns with electricity to stab opponents like a electric spear, as well as using acrobatic aerial attacks while slicing opponents with its bladed wings. It often nests at Wind's Gasp.The name "Rey Dau" comes from re (Italian for "king"), léi (雷; Chinese for "thunder"), and "ray" as in a ray of light. The "Dau" part comes from Arabic ḍawʾ (ضوء), meaning "light".[1] Before its name reveal, Rey Dau was dubbed by the Western fan community as "Thor Magala", seemingly originating from youtuber Hey Jay on Rurikhan's stream of the Summer Game Fest 2024 and discussion in the stream of how it seemed to resemble Gore Magala with its horns closed and charging. This nickname was acknowledged in a demo stream on the Monster Hunter YouTube channel. Before Arkveld's reveal, fans and developers alike thought that Rey Dau was the flagship of Wilds. Interestingly enough, all of Rey Dau's cutscenes involves it fighting Arkveld. Its horns are vulnerable to attacks after performing its railgun blasts, and focus striking them will cause a stagger. Rey Dau is the only Apex Monster to be weak to multiple elements. Rey Dau makes chime-like sounds due to fulgurite shards on its wings. For this reason, fulgurite shards are utilized by Kunafa to ward off monsters.
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