Getting Lagiacrus in Monster Hunter Stories is not as straightforward as simply finding one in the wild and stealing its egg. Lagiacrus is an endangered Leviathan that does not appear freely on the overworld until you have restored its population through specific in-game mechanics. Many players find themselves stuck after accepting the relevant story quest with no clear direction on where to begin.
In some cases, players searching Monster Dens near water in Azuria will find no Lagiacrus eggs at all — because the species simply has not been introduced to that habitat yet. Others complete the first step correctly but then wonder how to get the rarer Ivory Lagiacrus variant without wasting hours of farming. The process has multiple stages, and the game does not explain them clearly.
Here are all the methods to get Lagiacrus in Monster Hunter Stories 3, including the Ivory variant, along with its weaknesses, best skills, and everything you need to make it a powerful monstie.
What is Lagiacrus in Monster Hunter Stories?
Lagiacrus is a large Leviathan-type monstie feared as the “Lord of the Seas.” It is a semiaquatic monster that dominates the aquatic food chain using powerful thunder-element attacks, high agility in water, and the electricity stored in its distinctive dorsal shell-shockers. In Monster Hunter Stories 3: Twisted Reflection, it is classified as an endangered species — meaning you cannot simply encounter one roaming in the wild until you restore its population yourself.
Lagiacrus weaknesses
Knowing what Lagiacrus is weak to is important both for fighting it in the wild (to force a retreat and get its egg) and for building an effective counter team.
How to get your first Lagiacrus egg (Invasive Plesioth method)
The first and most reliable way to get a Lagiacrus egg in Monster Hunter Stories 3 is by driving away the Invasive Plesioth in Azuria’s Mirror Lake area. This is also a required step for the Adventuring State of Mind quest. The Invasive Plesioth has taken over Lagiacrus territory — defeating it forces it to retreat and reveals a den containing a preserved Lagiacrus egg.
- Travel toAzuria’s Mirror Lake area. You will need a water-capable monstie such as a Plesioth or Royal Ludroth to access the cave to the north where the Invasive Plesioth resides.
- Before engaging,investigate the monster’s trackscarefully around the area. This gives you clues on how to drive the Invasive Plesioth away more efficiently.
- Engage the Invasive Plesioth in battle. UseFire or Ice element attacksto deal maximum damage. Focus attacks on its head and body parts for maximum hitzone damage.
- Once you have reduced its health sufficiently,hit it with a Paintballto encourage it to flee. With enough damage dealt, it should retreat to its den.
- Follow the Invasive Plesioth to its den. Inside, you will find apreserved Lagiacrus egg— interact with it to collect it.
- Return to your camp andhatch the eggto get your first Lagiacrus monstie
Get more Lagiacrus eggs using Habitat Restoration
After you hatch your first Lagiacrus from the Invasive Plesioth’s den, you unlock the ability to use the Habitat Restoration mechanic to introduce Lagiacrus to the wild in Azuria. Once introduced, Lagiacrus eggs will begin appearing naturally in Monster Dens — allowing you to farm multiple eggs and hatch monsties with better genes and skills.
How to get Ivory Lagiacrus
The Ivory Lagiacrus is a rare subspecies required for the Adventuring State of Mind quest in Monster Hunter Stories 3. Unlike the standard Lagiacrus, you cannot get an Ivory Lagiacrus egg simply by raiding Monster Dens. You must first raise the Lagiacrus species’ Habitat Restoration rank to Rank A in Azuria before Ivory Lagiacrus eggs become available.
Best Lagiacrus skills and genes
Lagiacrus has a strong set of default skills built around its Thunder element identity, with potential genes that make it one of the more versatile Leviathan monsties in your roster. Below are the key skills to look for when hatching and building your Lagiacrus.
Default skills (always present)
Every Lagiacrus hatched in Monster Hunter Stories 3 will always come with its core Thunder-based attack skills and its Leviathan-type water traversal passive, which allows it to swim freely and carry you through water areas on the overworld map.
What to look for in genes
When farming multiple Lagiacrus eggs, prioritise eggs with Thunder Attack Up, Double Attack, and Thunder Element Attack genes for maximum offensive output. If you are building for a support or utility role, look for genes that complement your main rider’s weapon type. Higher Ecosystem Ranks also increase the chances of eggs hatching with S-Rank genes.
