Despite being the first area in the game and your home turf, Azuria is still home to several incredibly fearsome monsters, including the Invasive Seregios, which will prove capable of one-shotting your entire party throughout pretty much the entire game. As an Invasive Monster, however, this beast can be forced to retreat to its den, allowing you to obtain the endangered egg of a monster species it displaced, and this page will help you prepare and provide strategies for repelling the Invasive Seregios in Monster Hunter Stories 3!

Page Breakdown¶

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(1 of 5) Make sure you have a Hammer equipped - the humble Bone Hammer will serve you just fine.

Invasive Seregios Location and Preparation¶

We’re not going to lie, Invasive Seregios had us stumped for a while, mostly because the strategy you need to use to defeat the monster is adjacent to another gameplay mechanic which is usually superior and the in-battle hints are frustratingly vague to the point of being useless. We suffered so you don’t have to.

First you’ll need a Hammer, and the skills on the Hammer do matter - we’re not sure about every skill, but some skills like “Sweet Spot” or “Perfect Strike” and “Perfect Crush” should work. The unifying qualifier seems to be skills that “deal damage to all enemies”, but we didn’t try out every weapon. If you want a 100% confirmed and easy-to-acquire weapon, craft a Bone Hammer and equip that. Nothing else really matters, as again, the Invasive Seregios’s signature attack is so powerful that even wearing late-game armor with potent Decorations and buffs didn’t really matter. If you follow the directions below, however, you shouldn’t need any fancy armor or decorations.

Now that you’ve got your Hammer, fast travel to the “Mirror Lake” Catavan Stand, which is located on a small island along the northwestern edge of Mirror Lake. From there, swim over to an air vent rising out of the water to the northeast and when you reach it switch to a flying Monstie to glide up to the top of the air vent, then turn northwest to find a ledge you can land on. Head uphill to the northwest and north and when you crest a hill you’ll see an area enclosed by mountains below you - the demesne of the Invasive Seregios.

To get the tracks that’ll tell you roughly how to fight the creature you’ll need a flying Monstie, just keep an eye on the Invasive Seregios and don’t let him catch you! The first track is in the middle of the enclosure, so grab it and keep running north to find an air vent that’ll take you up into the sky - you can safely pay attention to the dialog when your airborne, and your companions will consider deflecting the Invasive Seregios’s hardened scales back at it. At the top of the air vent you’ll find a ledge to the north with the second set of tracks on it, which… just reiterates what was previously said. Finally to get the third set of tracks glide along the cliffs to the southwest to land on another, lower ledge to find a Hammer. This intel will have to suffice!

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Invasive Seregios gives you a brutal welcome, launching “Shredding Scales” almost immediately, likely defeating most of your party,

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before following up with “Aerial Chaser”, another heavy-hitting attack.

Defeating the Invasive Seregios¶

Like all Invasive Monsters, Invasive Seregios starts out with a semi-scripted series of rounds you have to endure before you can end the fight, and this time it’s pretty brutal…

• Invasive Seregios will use “Shredding Scales” on his first turn, which will almost certainly wipe your entire party. Ouch. It doesn’t remotely matter what you do on your turn, since you’ll probably lose a Heart anyways, cancelling all your buffs and restoring your HP and Stamina.
• On the second turn Invasive Seregios will use “Aerial Chaser” on a target. This will deal massive damage - hopefully not enough to KO you again.
• On the third turn you’ll be told that “the real fight has begun”, and to mark this Invasive Seregios will use a “Invasive Onslaught Roar” to buff itself.
• On the next turn Invasive Seregios will use “Scale Shots”, which will deal heavy damage to its target - your protagonist.

The key to this fight is on the third turn, when Invasive Seregios uses “Invasive Onslaught Roar”. The aura of the attack will be colored red (Power), green (Technique) or blue (Speed), letting you know what attack type the “Scale Shots” attack will be on the next round. Scale Shots, unlike “Shredding Scales” is single target and survivable, especially if you win the Head-to-Head matchup, but it’s still quite powerful, and Invasive Seregios will only do this “Invasive Onslaught Roar”/”Scale Shots” combo twice before calming down… which sounds like a good thing, but it means the next turn it’ll use another “Shredding Scales”, which will almost certainly end the fight.

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(1 of 3) Survive the first two round and on the third Invasive Seregios will start using “Invasive Onslaught Roar”. Pay attention to the color of the aura during the roar,

What you’ve got to do is pay attention to the color of the aura that appears when Invasive Seregios uses “Invasive Onslaught Roar”. On the next turn you need to use a Hammer skill with the dominant attack type, which will cause you to deflect the scales back at Invasive Seregios and send it flying back to its den in an ignominious retreat! This is extra tricky because, under normal circumstances you’d think to use a Double Attack against a counterable enemy attack, but that doesn’t work. Also using the wrong Hammer skill, even if everything else was done correctly, will give you the misleading hint that while you deflected the attack, your aim was off, and you need to use something with more precision.

Anywho, to make things simple, pay attention to the aura, and, assuming you’re equipped with the Bone Hammer, use “Sweet Spot” with the correct attack type on the next turn to win. If the aura’s color is red, use a Speed attack, if the aura is green use a Power attack and if it’s blue use a Technique attack. And if you’re colorblind… well, that’s between you and Capcom.

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Raid Invasive Seregios’s den to get an Astalos egg - a creature best released in a thunder region so it can mutate into the Boltreaver Astalos variant.

Drive off the Invasive Seregios, enter its den, and poach a Flying Wyvern egg trapped in the egg quartz, then hatch it to rebirth the Astalos species. This breed of Flying Wyvern has one mutant variant, the Boltreaver Astalos, which requires a “thunder elemental area containing 3 or more thunder elemental monsters”. Broadleaf Basin, Mt. Canalta and the Rococo Rocks are all thunder elemental areas, but we have plans for the latter. In our opinion, the best place to release Astalos is Broadleaf Basin, as the Tobi-Kadachi will give you one thunder element monster and Astalos itself counts as a second (you need Rank S Astalos to mutate Boltreaver Astalos). This means that aside from Astalos you need to introduce one other thunder element monster to the region: Rey Dau, Khezu, Red Khezu, Zinogre, Thunderlord Zinogre, Lagiacrus, Ivory Lagiacrus and Fulgur Anjanath should all suffice, so pick whatever you want to see more of in the region.