Key Points
- For Odgen’s Theory quest, you need to hunt down a new monstie; the Exotic Seregios.
- This monstie is located in Canalta Timberland.
- You will require an Arzuros to lure out the monstie in question.
Fighting monsties isn’t the only thing you have to do in Monster Hunter Stories 3. Once you have unlocked new party members, you can pick up their side quests to get unique rewards. Following Odgen’s questline will lead you to an exotic monstie location, and defeating it is well worth the rewards.
Read More: MHS3 – Find the Regalfin
MHS3 – Ogden’s Theory Overview
| Quest giver | Ogden |
| Locations | Sheparden, Canalta Timberland |
| Objective | Find the Exotic Seregios |
How to Unlock Ogden’s Theory Side Quest
Ogden’s Theory side quest unlocks after completing the first quest from Ogden called “A Letter from an Unknown Sender”. If you haven’t reached this far, then you need to unlock Azuria Castle first. For me, the castle unlocked after picking up the main story quest called “Amara’s Child”, right after I was done unlocking the Habitat Restoration function. While completing the Amara’s Child quest, I just had to watch the starting cutscene of the quest until I got free rein of my character again to roam.
In case you wish to know which cutscene I am talking about, it is right after meeting up with Rudy near the castle. Rudy eventually led me to a meeting point between Glazer, Arken, and Romney. I also got a glimpse of my character’s past during the conversation with Simon about my character’s first Rathalos. Once the cutscene ended and I could free roam again, I headed straight to the Ranger’s Mess.
I could finally speak to Ogden here and pick up his first side quest, “A Letter from an Unknown Sender”. This side quest is fairly straightforward; all I had to do was help Odgen locate and defeat the Exotic Velocidrome. Once that was done, I continued to follow the main story quest until I completed the Forbidden Ground quest at Sheparden and set up a base there. Following this, Ogden offered another quest for me to pick up, which led to Ogden’s Theory.
How to Complete Ogden’s Theory Side Quest
To start the Ogden’s Theory side quest, I met him at the camp in the western section of Sheparden. Speaking to him unlocked my next quest objective, which is to seek out the Exotic Seregios and defeat it for Ogden. Before you venture forward, you need to own two particular monsties in your party:
- Any flying monstie
- Arzuros
While checking the map after picking up the quest, I spotted a quest marker that led me to Canalta Timberland’s Blessing Hill. Upon reaching the Blackwoods Catavan Stand, follow the river north until an opening is revealed on the right. Go up the hill and continue east until the path turns west upwards. Continue up that path, then fly across the gap. Keep going uphill to find the quest marker ahead.
After the cutscene ends, travel south to find another quest marker near a tree. Once that cutscene ended, my quest objective changed. I had to find a way to lure the Exotic Seregios using an Arzuros. Luckily, since I already owned an Arzuros in my team, I could use it to ride towards the tree quest marker. This triggered the Exotic Seregios boss fight.
How to Defeat the Exotic Seregios
- Weakness: Thunder (most weak), Ice (weak)
- Resistance: Fire (most resistant), Dragon (resistant)
- Elemental type: Non-elemental
The Exotic Seregios will be lured with Arzuros’ Honey Power, which will make it more reckless but less dangerous to your party. Seregios will attack using Speed first, and to counter it, I used Technique attacks. If you don’t have any reliable Technique attacks, wait for Seregios to switch to its Enraged state, where it will use Technique attacks instead. That way, you can use Power attacks to counter those.
If you plan to retire your Arzuros, don’t. I found out the hard way that Seregios will unleash its Shredding Scales attack after I retired Arzuros from my team. Unfortunately, Shredding Scales deals significantly more damage, which was enough to wipe out my team the first time.
While attacking Seregios, keep an eye on the connection line between it and your Arzuros. This indicates that the next attack is counterable. If uncounterable, as indicated by a red arrow, use Kinship attacks instead. In short, double attack whenever possible and keep a close eye on everyone’s health. Continue healing and counter as much as possible until the Seregios is defeated.
Read More: Monster Hunter Stories 3 – How To Get Lagiacrus, Brachydios, Astalos & Espinas Early
FAQs
How do I get an Arzuros?
Speak to the Honey Harvesting Man near the tree quest marker to get a hint on finding Arzuros eggs. Continue north to find a wild Arzuros on the plains below. Enter the fight with the Arzuros, then, after it retreats, enter its den to collect an egg. Hatch the egg to get an Arzuros.
What rewards do I get for completing this quest?
You will get the Hammer for Ogden, and his Chirpy will learn the skill Proliferating Poison. This skill extends Poison infliction duration by 4 turns.
I can’t find this quest. What do I do?
You need to progress through the main story quest for a while and also complete the first quest from Ogden to get this quest.
