
This is a guide to repelling the Invasive Seregios in Monster Hunter Stories 3 (MHS 3). Learn the puzzle mechanics for repelling the Invasive Seregios and the necessary steps you need to take to beat the boss.
| Variants |
Invasive Seregios |
Seregios |
Exotic Seregios |
|---|---|---|
| World View | Map View |
|---|---|
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The Invasive Seregios can be found at night at the Northwest part of Azuria. To reach the area, you'll need a flying Monstie and ride the updrafts to reach the elevated area leading to its location.
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1. Invasive Battle Clues 2. Bring a Hammer with an AoE Skill 3. Watch its Roar Move 4. Win the Head-to-Head Fight with an AoE Hammer Skill |
| Clue | |
|---|---|
| 1. | The scales are lodged into hard stone. What in the world could've caused this, I wonder. |
| 2. | Our advantage? You mean that idea to reflect the scales back? |
| 3. | Is this... a hammer? It's certainly seen better days... |
The clues for the invasive tracks requires you to bring a hammer and winning a head on attack by parrying the scales back to Invasive Seregios.

The main prerequisite to repelling Invasive Seregios is bringing a hammer with an AoE skill such as Sweet Spot, Perfect Crush, or Perfect Strike. This is only stated mid-fight where repelling the scale back must be done “with a perfect strike”.

Before unleashing its attack that you can battle via Head-to-Head, it will unleash a roar move to buff itself. It will use an attack of the same type as the color of its roar. For example, if its roar is the color red, it is a Power Attack, so respond correctly!

Once Seregios uses the roar, retaliate with an AoE skill using an attack type that wins against the attack it will use. This means that if Seregios for example, uses a quickening roar (Blue roar), it will use a speed attack so a technical attack will let you win the fight.

After repelling invasive Seregios, you'll be able to obtain an Astalos Egg in its invasive dane.
How to Get Astalos and Weaknesses
| Body Part | Slash |
Pierce |
Blunt |
|---|---|---|---|
| Head | ✕ | ✕ | ◯ |
| Wings | ◯ | ✕ | ✕ |
| Leg | ◯ | ✕ | ✕ |
| Tail | ✕ | ◯ | ✕ |
Note that some monsters change weaknesses and resistances when they transform.
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| All Main Mission Bosses | |
|---|---|
| Azuria (Chapter 1) | |
![]() Honed Glavenus |
Invasive Yian Garuga |
![]() Dual Feral Velocidromes |
Feral Gypceros |
![]() Magnamalo |
- | Cataracts (Chapter 2) |
Feral Great Izuchi
|
Invasive Arzuros |
![]() Feral Somnacanth |
![]() Feral Aknosom |
![]() Yama Tsukami |
- |
| Galyad (Chapter 3) | |
![]() Feral Ajarakan |
![]() Feral Rakna-Kadaki |
Rey Dau |
- |
| Seranthis (Chapter 4) | |
![]() Feral Blangonga |
Goss Harag |
![]() Malzeno |
![]() Arkveld |
![]() Bound Azure Rathalos |
![]() Bound Lunagaron |
Aenshin |
|
| All Invasive Monster Bosses | |
|---|---|
Invasive Yian Garuga |
Invasive Seregios |
Invasive Plesioth |
Invasive Arzuros |
Invasive Nerscylla |
Invasive Shogun Ceanataur |
Invasive Diablos |
Invasive Odogaron |
Invasive Khezu |
- |
| List of All Feral Monsters | |
|---|---|
Feral Nerscylla |
Feral Brachydios |
Feral Tobi-Kadachi |
Feral Glavenus |
Feral Bishaten |
Feral Espinas |
Feral Paolumu |
- |
| List of All Elder Dragon Bosses | |
|---|---|
![]() Namielle |
![]() |
Yama Tsukami (Green) |
Velkhana |
Aenshin |
- |
| List of All Exotic Monster Bosses | |
|---|---|
![]() Exotic Seregios |
Exotic Velocidrome |
| List of All Optional Bosses | |
|---|---|
Espinas
|
- |
Hello dear user, thank you for providing additional info for the guide! We have now adjusted it to include all Area-of-Effect Hammer skills instead of only Perfect Strike.
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How do you get the clues the monster’s area is so open with almost no hiding spots