Lagiacrus

Lagiacrus
ラギアクルス (Ragiakurusu)
English Title	Sea Wyvern Lord of the Seas The Azure Lightning
Japanese Title	海竜
Chinese Name	海龙 (Simplified Chinese) 海龍 (Traditional Chinese)
Korean Name	라기아크루스
General Information
Monster Class	Leviathan
Elements	Thunder Water (When underwater)
Ailments	Thunderblight Waterblight (When underwater)
Weakest to	Fire Earth (MHXR)
Habitat	Deserted Island Flooded Forest Jungle Misty Peaks Ruined Pinnacle Scarlet Forest Paupau Beach Lamure
Size	3310.6 cm 2330.7 cm
Related Monsters	Ivory Lagiacrus Abyssal Lagiacrus Landconquest Lagiacrus
Generation	Third

Lagiacrus are Leviathans introduced in Monster Hunter 3.

Appearance

Lagiacrus is a monster with serpentine body, roughly resembling a crocodile with a long neck. Its body is covered in blue shells along its head, back, and the base of the tail, while the underside is light brown in color. Adorning its head is a pair of brown color horns, with three pairs of dermal spikes of the same color on its back. Its tail flare out horizontally at the base, before turning laterally flat with a fin at the end. Its mouth, in addition to a jaw full of small teeth, it also has a roll of shell spikes on both upper and lower jaw, arranged like a second row of jaw.

When a Lagiacrus is fully sunbathed, it turns a dry grayish-blue color and its dermal spikes turn brown. When it returns to the water, Lagiacrus regains a striking deep blue color and its spikes return to their original color of a very light beige.

Abilities

The dermal spikes on its back glow white when it is using strong thunder attacks, and its mouth gurgles with Thunder when it is enraged. It is also capable of the Water element, but only when underwater.

Habitat

Lagiacrus is found only at the Deserted Island, Flooded Forest and Misty Peaks. It's most at home underwater, but is more than capable of fighting on land.

Game Appearances

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Main Series

• Monster Hunter 3 (Introduced)
• Monster Hunter 3 Ultimate
• Monster Hunter Generations
• Monster Hunter Generations Ultimate
• Monster Hunter Wilds

Spin-offs

• Monster Hunter Stories
• Monster Hunter Stories 2: Wings of Ruin
• Monster Hunter Riders
• Monster Hunter Explore

Crossovers

• TEPPEN

In-Game Description

Monster Hunter 3 Known as Sea Wyverns, Lagiacrus are at the top of the aquatic food chain. Feared by sailors as 'The Lords of the Seas', they store enough electricity in their spinal organs to make the oceans surge. Occasionally seen resting on land. Monster Hunter 3 Ultimate Leviathans that exist at the top of the aquatic food chain. Feared by sailors as the "Lords of the Seas", Lagiacrus store enough electricity in their spinal organs to make the oceans surge. Occasionally they can be found resting on land as well. Monster Hunter Generations Leviathans that exist at the top of the aquatic food chain. Feared by sailors as the "Lords of the Seas", Lagiacrus store enough electricity in their spinal organs to make the oceans surge. Occasionally they can be found resting on land as well. Threat Level (危険度): ★★★★★ Monster Hunter Wilds Leviathans that exist atop the vast aquatic food chain. Lagiacrus generate electricity via their hides to then store in their spinal organs, and are capable of discharging a current strong enough to boil the seawater around them. They have been sighted fighting other monsters in the Scarlet Forest, presumably drawn in from other regions in search of prey and more fertile environs. Monster Hunter Stories Leviathans atop the aquatic food chain, due in no small part to their ability to deliver electrical shocks. Monster Hunter Stories 2: Wings of Ruin Leviathans atop the aquatic food chain, due in no small part to their ability to deliver nasty electrical shocks. While feared by sailors who traverse the seas, the monster can occasionally be found resting on land as well.

Element/Status Effectiveness

Element Damage Hitzone Head 15 0 0 5 5 Neck 15 0 0 5 5 Back 25 0 0 15 15 Body 30 0 0 10 10 Tail 15 0 0 5 5 Foot 15 0 0 5 5

Status Effect Poison Paralysis Sleep Fatigue Stun Initial Tolerance 180 180 180 180 150 Tolerance Inc. (max) +130 (700) +150 (780) +130 (700) +120 (660) +150 (750) Tolerance Recovery 5/ 10 sec 5/ 10 sec 5/ 10 sec 5/ 10 sec 5/ 10 sec Duration 60 sec 10 sec 30 sec --- 10 sec Damage 150 + 5 --- --- 200 ---

Item Effectiveness

Item Effect
Item Name	Able	Effectiveness	Duration (1st time)	Duration (2nd time)	Notes
Pitfall Trap	✔	★☆☆			Works only when on land.
Shock Trap	✔	★★☆			Works on land and underwater.
Flash Bomb	✔	★★☆
Sonic Bomb	✔	★☆☆			Flinches and drops a shiny item
Dung Bomb	✔	★★☆
Meat	x	☆☆☆

Damage Effectiveness

For the damage formula (how it's calculated), hitzone charts, Lagiacrus info and more click the following links: Monster Hunter 3 Damage Formula or Monster Hunter 3 Hitzone Charts. Images created by Inkoseh.

MHGen Breakable Parts

Head (x1)

Back (x1)

Chest (x1)

Front Claws (x1)

Tail (Sever)

Notes

• General
• MH3
• MH3U
• MHGen
• MHW
• MHWilds
• MHST2

General Notes

• Lagiacrus shares many conditions with Rathalos:
  • Both held the title of a flagship monster.
  • Even though they are flagship monsters, they didn't have their own theme music until Monster Hunter Wilds.
  • Both are weak to each other's elemental powers.
  • Both appear in Tri's opening movie.
  • Both have their subspecies appear in MH3U's opening.
  • Both have a subspecies that inhabits the same habitat as them and a rare species that shares habitats with Elder Dragons.
  • Both are the only old flagship monsters that can be fought in 3U's low ranked quests.
• The theme; Tremors on Land and Sea - Lagiacrus of Lagiacrus was voted among the top 10 music themes in the Hunters' Choice: Top 10 Monster Themes - Monster Hunter 20th Anniversary
• Lagiacrus was voted 3rd place in the Hunters' Choice for Top Monster during Monster Hunter's 20th Anniversary.
• Lagiacrus does not return in Monster Hunter Portable 3rd. However, it does appear in MH Diary: Poka Poka Airu Village, and returns in Monster Hunter 3 Ultimate and MH Diary: Poka Poka Airu Village G.
• Lagiacrus shares some of its physical attacks with Royal Ludroth and Agnaktor.

Monster Hunter 3

Lagiacrus is the first Leviathan of its kind to be encountered in Monster Hunter 3.

When encountered for the first time offline, in the 1* Village Quest: "Guts- It's What's for Dinner"; Lagiacrus cannot be killed. Its body parts can be broken, and its tail can be carved, but it will only go as far as limping, and cannot be killed until the Urgent Quest in the Village.

When present in Deserted Island, Lagiacrus will, on rare occasion, leave the water and venture no further inland than Area 5.

Even if the Lagiacrus' tail is cut or its parts broken in the "Trial of the Sea Dragon" urgent quest, it will return in "Fell the Lagiacrus" healed and unwounded.

The Lagiacrus is one of only two monsters in Monster Hunter Tri to have a weapon in every category. The other is Alatreon.

The only electrical attack Lagiacrus can do on land is spitting thunderballs. Lagiacrus is not able to utilise its shell shockers on land.

Monster Hunter 3 Ultimate

Breaking its dermal spikes reduces its ability to use electrical attacks.

When low on stamina, it will fail to use its electrical charge attacks.

Hitting Lagiacrus with any kind of bomb (including Sonic Bombs and Crag/Cluster shots) underwater may cause it to drop an item.

A Lagiacrus either will eat an Epioth, or come up on land for air to recover Stamina - however, both often give no indication of Stamina recovery.

The Lagiacrus is the biggest Leviathan that dwells in the water, since the Ceadeus is considered an Elder Dragon.

When Lagiacrus hits an underwater pillar or a rock and destroys it, it may drop an item (Offline mode only).

Lagiacrus' roar requires Earplugs to block.

Monster Hunter Generations

Lagiacrus uses a drastically different set of electrical attacks to compensate for the removal of underwater combat. However, lore-wise, Lagiacrus should not be able to use its shell shockers on land. Using shell shockers on land is an ability unique to Ivory Lagiacrus.

When enraged, thunder will surge around its horns.

Lagiacrus will prey on Kelbi to recover stamina.

In G Rank Lagiacrus gains a powerful, short-ranged thunder blast from its mouth. It also taunts less frequently.

Monster Hunter: World

Lagiacrus was prototyped early in the development of Monster Hunter: World, but was cut from the final game due to animation issues.

It would have dominated Anjanath in turf wars, like Rathalos, only in the prototype the turf war resulted in Anjanath's death.

Monster Hunter Wilds

Lagiacrus was added in Monster Hunter Wilds's second title update on June 30, 2025.

It now has its own battle theme, which is a rendition of the Deserted Island.

Lagiacrus has a smaller size compared to previous entries.

It has a Turf War with Rathalos, Uth Duna, and is drained by Arkveld.

• The outcome of its Turf War with Rathalos is dependent on whether Lagiacrus is charged up or not; Rathalos wins if it is not, and Lagiacrus wins if it is.

Lagiacrus can be power clashed by blocking its lunging bite attacks.

It can be fought while underwater in its nest unlike any other monster currently present in the game. Whilst it isn't possible to directly attack it using weapons, hunter's can use the structures and special Slinger pods to damage it.

• When staggered the hunter can use the Clutch Claw to latch onto Lagiacrus and attack a part alike mounting.
  • This is currently the only time the Clutch Claw utility is seen or used in Wilds.
• When enough damage is done, a cinematic will play where the hunter fire's a Slinger Pod into the Lagiacrus's head point-blank and forces it back to land.
  • If the damage threshold is failed or the section is ignored completely Lagiacrus will perform its ultimate attack that has it engulf the entire area in an electrified tsunami.
  • If the damage threshold is met while Lagiacrus is close to the wall of sharp coral, it will take additional damage and fall over once it surfaces.

Similar to Alatreon in Iceborne, the Tri victory theme will play upon completing its assignment quest.

Its chest is no longer breakable.

Monster Hunter Stories 2

Lagiacrus is a Power type monster. It also attacks with Double Fang.

• Opposing Lagiacrus’ turn to Speed attacks, Electro Breath, and Bolt Pressure when enraged, and Technical attacks and Wretched Water when its charged with Electrify.

When charged, its back crystals will glow and become a breakable part, which must be broken to return to normal.