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The Astalos is a Flying Wyvern monstie in Monster Hunter Stories 3 (MHS3). Learn how to get a/an Astalos, plus their weaknesses, skills, stats, and locations.
| Variants |
Boltreaver Astalos |
Astalos |
|---|
| Invasive Monster | Map Location | Retreat Requirement |
|---|---|---|
Invasive Seregios
|
![]() |
• Use a hammer that hits multiple enemies • Survive the 2nd Turn • Check the color of its shout and then use an AoE skill with that attribute |
Astalos can be acquired by finding the Invasive Seregios in the location shown above and forcing it to retreat. After it retreats, a den will spawn where you will be able to acquire the Astalos egg.

To begin getting the eggs of Astalos in Egg Dens, restore them in the habitats of your choice. This should not only allow you to get its eggs, but also integrate dual elements.
| Transformation | Attack Type and Element |
|---|---|
| Normal |
|
| Bolt |
| Skill | Level Unlocked | Details |
|---|---|---|
|
Astalos Pulse
(Kinship Skill) |
1 |
Target: Single Enemy Effect: Deals thunder damage to one enemy. High chance of landing a critical hit. |
Plasma Cannon
|
1 |
Type: Active Target: Single Enemy Effect: Deals thunder damage to one enemy. Chance to inflict Paralysis. |
Vengeful Thunder
|
20 |
Type: Active Target: Single Enemy Effect: Deals thunder damage to one enemy, inflicting greater damage the lower the user's HP is. |
Thunder Smash
|
40 |
Type: Active Target: All Enemies Effect: Deals thunder damage to all enemies and inflicts Thunder Defense Down. |
These are skills that the Astalos will always have.
| This section is still under construction. |
These are skills that the Astalos can potentially have when hatched.
Note that some monsters change weaknesses and resistances when they transform.
| Ailment Resistances | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Elemental Resistances | |||||||||||||||||||||||||||||||||||||||||
| Ailment Resistances | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Elemental Resistances | |||||||||||||||||||||||||||||||||||||||||
| Main Body | ![]() |
|---|---|
| Head | ![]() |
| Wings | ![]() |
| Tail | ![]() |
| Main Body | ![]() |
|---|---|
| Head (Bolt) | ![]() |
| Tail (Bolt) | ![]() |
| Wings (Bolt) | ![]() |
These determine which weapon type will be most effective in breaking the specific targetable parts of the monster.
| HP | 5 |
|---|---|
| Attack | 8 |
| Speed | 8 |
| Defense | 8 |

| Endangered Monsties | Mutated Monsties |
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Astalos does SPEED attacks when in normal mode, not technical.