In Monster Hunter Stories 3, several quests require players to track down rare Monsties. One of the most confusing tasks appears in the “Adventuring State of Mind” quest, where you must obtain an Ivory Lagiacrus.

The problem is that the game does not clearly explain how to unlock this monster. Many players start the quest but do not know where to find a Lagiacrus or how to make the Ivory variant appear.
This guide explains exactly how to get Lagiacrus, how to raise its ecosystem rank, and how to finally obtain Ivory Lagiacrus so you can complete the quest quickly.
Quest Objective: Finding Ivory Lagiacrus in MH Stories 3
The Adventuring State of Mind quest asks players to bring an Ivory Lagiacrus to an NPC located in Azuria. However, Ivory Lagiacrus does not appear naturally until you first restore the population of normal Lagiacruses.
Because the quest instructions are vague, many players struggle to progress after accepting the mission.
To complete the quest, you must follow three main steps:
- Obtain a Lagiacrus egg
- Restore the Lagiacrus population through Habitat Restoration
- Find an Ivory Lagiacrus egg
Once you understand these steps, the quest becomes straightforward.
How to Get a Lagiacrus in Monster Hunter Stories 3
Before searching for an Ivory variant, you must first obtain a standard Lagiacrus.

Step 1: Go to Azuria’s Mirror Lake Area
Travel to the Mirror Lake region in Azuria. This area contains the monster responsible for unlocking Lagiacrus eggs.
Step 2: Find the Invasive Plesioth
Inside a cave north of the lake, you will encounter an Invasive Plesioth. This monster must be defeated or forced to retreat before you can access the nest containing the Lagiacrus egg.
Step 3: Break the Monster’s Head
During combat, the Plesioth will charge an attack by filling its head with water.
Break its head while it prepares this attack. Doing this forces the monster to retreat quickly and exposes its nest.
Step 4: Collect the Lagiacrus Egg
After the monster retreats:
- Enter the den
- Interact with the preserved egg
- Take it back to camp
- Hatch the egg
Once hatched, you will receive your first Lagiacrus Monstie.
Restore the Lagiacrus Population
Getting one Lagiacrus is not enough to unlock Ivory variants. You must increase the Habitat Restoration rank for the species in Azuria.
How Habitat Restoration Works
Habitat Restoration improves the ecosystem by releasing Monsties back into the wild. To increase the Lagiacrus ecosystem rank:
- Hatch multiple Lagiacrus eggs
- Release them through the Habitat Restoration mechanic
- Repeat the process several times
Releasing about five Lagiacruses usually raises the rank enough to unlock new variants.
Once the rank increases, Lagiacrus eggs start appearing more frequently in Monster Dens.
How to Get Ivory Lagiacrus in Monster Hunter Stories 3
After improving the species rank, you can begin searching for the Ivory Lagiacrus egg.
Best Method to Spawn Ivory Eggs
Follow this strategy for the best results:
- Explore Monster Dens near water in Azuria
- Search for nests at night
- Collect eggs repeatedly until the Ivory variant appears
Players often find the Ivory Lagiacrus egg in dens located near lakes or rivers.
Because it is a rare variant, you may need several attempts before finding one.
Guaranteed Method to Get More Lagiacrus Eggs
If you want more chances quickly, you can force Lagiacruses to retreat.
Follow this process:
- Fight a Lagiacrus
- Lower its health
- Throw a Paintball
- Defeat the monster
If successful, the monster retreats and spawns a Monster Den filled with Lagiacrus eggs.
This method greatly speeds up the farming process.
Lagiacrus Overview (Monster Stats)
| Attribute | Value |
|---|---|
| Monster Type | Leviathan |
| Element | Thunder |
| Attack Style | Power / Speed / Technical |
| Attack Stat | 7 |
| Defense Stat | 6 |
| Speed Stat | 6 |
Lagiacrus sits near the top of the aquatic food chain and stores electricity inside its dorsal organs before releasing powerful thunder attacks.
What to Do After Getting Ivory Lagiacrus
After obtaining an Ivory Lagiacrus, the final step is simple.
- Equip the Ivory Lagiacrus in your Stables
- Return to the NPC who gave the quest
- Speak with him again
The quest completes immediately once the Ivory Lagiacrus is shown.
Ivory Lagiacrus vs Normal Lagiacrus
Although the Ivory variant looks similar to the original monster, it offers different skills and abilities.
This allows players to adapt their team for different combat situations, making the variant useful even after finishing the quest.
If you enjoy discovering rare Monsties, the Ivory Lagiacrus quest becomes a rewarding challenge. Once you understand the ecosystem mechanics and egg farming strategies, you can complete the mission without wasting time wandering around Azuria. Play Now!
