Rey Dau weakness: use Ice and target the head
The short answer: Ice is Rey Dau’s primary elemental weakness. Water is a usable secondary choice on several parts, but Thunder is resisted. For most weapons, the head is the best target when a real opening exists; use the wings when the head is unsafe or moving.
A repeatable Rey Dau hunt plan
- 01Prepare for Thunder, not every possible problem
Raise Thunder resistance if lightning is causing carts. Bring the recovery and defensive tools your actual attempts prove you need; do not trade away all damage for theoretical safety.
- 02Stay off the center line
Use a front-quarter position where the head remains readable without standing directly in front of the charged discharge. Keep enough stamina to move again after the first dodge.
- 03Wait for commitment
Rey Dau is safest to punish after a large discharge, a resolved landing or a terrain-created knockdown. Start with a short guaranteed attack; extend only when the recovery is still visible.
- 04Convert wounds deliberately
Use Focus Mode to confirm a reachable wound. Do not chase a head wound through a new lightning sequence when a wing or clean reset is available.
Reliable attack windows
| Window | What to read | Safe response |
|---|---|---|
| Large lightning discharge | The head and body commit to a clear firing line | Leave the line, then close on the head during recovery |
| Landing | The flight path resolves into a grounded pause | Use a short punish first; do not assume a full combo |
| Reachable wound | Focus Mode shows a wound without crossing the frontal line | Take the Focus Strike only when the exit remains open |
| Nest terrain | Rey Dau moves under a prepared environmental hazard | Trigger the interaction and convert the knockdown |
| Head unavailable | The face is airborne, turning or charging | Take the wing or reset instead of forcing the weak point |
The head produces the best opportunity only when you can reach it safely. A weaker part hit that keeps the hunt under control is better than missing the head and eating the next discharge.
Why Rey Dau hunts fall apart
- Attacking during the charge: the visual effect is not the opening; the recovery after the discharge is.
- Standing directly in front: move to the front quarter so the head is readable without occupying the lightning line.
- Using a Thunder weapon: switch to Ice, a suitable Water option or a strong raw weapon you can operate reliably.
- Overcommitting after landing: confirm the pause with a short punish before spending your longest animation.
- Chasing every wound: a wound does not cancel Rey Dau’s next attack. Take it only when position and timing agree.
Rey Dau weakness FAQ
Is Rey Dau weak to Ice or Water?
Ice is the primary elemental choice. Water can still contribute on several parts, but it is generally the secondary option. Weapon quality and your ability to hit the head still matter more than choosing a poor Ice weapon only for the label.
What part should I break first?
Prioritize the head when the discharge or landing creates a safe opening. The wings are the practical fallback when the face cannot be reached without crossing the attack line.
Does this guide cover Arch-tempered Rey Dau?
The positioning principles transfer, but Arch-tempered Rey Dau has a separate difficulty and event context. Do not treat the timing or survival margin here as an exact Arch-tempered script.
Is Ray Dau the same monster as Rey Dau?
Yes. “Ray Dau” is a common misspelling. The official monster name is Rey Dau, the lightning-wielding apex of the Windward Plains.
Should I use exact weakness numbers from this page?
No. The page deliberately withholds exact hitzones and status thresholds until direct in-game evidence is attached. Use the qualitative priorities—Ice, head, safe recovery windows—without pretending they are a complete damage spreadsheet.
Official sources and review boundary
Official sources confirm Rey Dau’s identity, Windward Plains habitat, Sandtide relationship, lightning behavior and Arch-tempered context. The element summary is cross-checked against current monster data; exact numerical tables remain behind the direct-capture gate described above.
Official description of Rey Dau as the Windward Plains apex, its Sandtide habitat and electrical discharge attacks.
PlayStation Blog · Capcom USA · Checked Aug 18, 2026Official monster profile confirming Rey Dau’s Flying Wyvern classification, region and electric attacks.
PlayStation · Checked Aug 18, 2026Official hunt footage for the harder Arch-tempered form; used only for encounter context, not exact normal-hunt numbers.
Monster Hunter official YouTube · Checked Aug 18, 2026
