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Spoiler Warning: Plot details follow. Read at your own risk.
Before you squats an abomination born from your most terrible nightmares. The monster dwelling in those blood soaked depths must be the labyrinth's final enemy! Unsheathing your weapons, you prepare to face the heart of the labyrinth!

Primevil introduction, Etrian Odyssey

PrimevilScan

Primevil/Yggdrasil Core.

Primevil (Yggdrasil Core in Untold) is the true final boss of the first game and its remake.

He is found in the B30F (The sentinel of eternity), the lowest floor of the Yggdrasil Labyrinth, and is the hardest boss in the game; he may also be the hardest boss in the entire series.

This abomination is the sentient Yggdrasil Tree's core, the last stand of the labyrinth. It has many forms of attacks, having control over the three elements to cast devastating, lost spells, or using its long tentacles to rip apart unlucky explorers. Should one survive those forms of attacks, it can devastate its enemies in other ways too, using hallucinating pollen to destroy the mind, or using its powerful magic to rot its victims alive, leaving nothing on it's wake.

HistoryEdit

Primevil ending

Primevil as seen in the ending movie of Untold

In Etrian Odyssey, very little was revealed about Primevil. The only known fact, revealed by the Bestiary Entry (or Monstrous Codex), was that Primevil is the core of the Yggdrasil Tree.

The remake of the first game, Etrian Odyssey Untold, had a Story Mode that provided more of a back-story to it. Renamed as the Yggdrasil Core, Primevil is confirmed to be the main part of one of the seven mighty trees, created during the Yggdrasil Project, a project in which scientists had tried to create something meant to purify the world, absorbing all the pollution so that mankind could live properly again. The trees managed to succeed in their original task. However, due to the enormous amount of pollution absorbed by it, their cores would eventually mutate and become unstoppable monsters. They had hypothesized this, and thus Frederica Irving offered to be shut inside a capsule that would awaken her exactly one-thousand years later. This would eventually lead to the Highlander's task of defeating the Yggdrasil Core and saving the world, mainly the town of Etria.

AppearancesEdit

Etrian OdysseyEdit

Primevil
Primevil fix

HP

90000

AT

585

DF

170

Exp

0

Skills

Cyclone,Slash,Rush

Item Drops

Demon Core

Description

The Labyrinth's core which erected the Claret Hollows to protect itself.

Weakness

None

Resistance

Status Ailments, Binds

 

Primevil is the final boss of Etrian Odyssey. Not much has been revealed about it; in fact, the only known detail is that Primevil is the core of the great Yggdrasil Tree. Before you can fight it, however, you must have killed the Wyrm once; the beast has a seal on the door that leads you closer to Primevil, which can be unlocked once you defeat it.

Although unnecessary, it is recommended that you also defeat the Dragon and the Drake, as one has sealed a door leading to a healing fountain and the other has sealed a warp area, which would allow you to travel freely from the Stratum entrance to B30F.

Once you step through the Wyrm's unlocked door, you will have to face weaker clones of the three elemental dragons; DrakoidDragoid and Wyrmoid in the aforementioned order. You cannot head back, however, once you enter, with the exception of using a Warp Wire.

You may finally battle Primevil after defeating the three clones.

Etrian Odyssey Untold: The Millennium GirlEdit

Yggdrasil Core

HP

90000

AT

99

DF

75

Exp

999999

Skills

Land Slash, Activate, Armageddon, Segment, Demon Rush, Explode(incomplete)

Item Drops

Demon Core, True Demon Core (Conditional Drop)

Description

The Labyrinth's core, which erected the Claret Hollows to protect itself.

Weakness

Fire, Ice, Volt

Resistance

 

Yggdrasil Core is the final boss of Etrian Odyssey Untold. Unlike the first game, it has been given a back-story. It is the main antagonist and final boss of the story mode, and an optional final boss of the classic mode. The version fought in the story mode is way weaker than the original core, due to a powerful composite used by the party to weaken it. In order to fight the core at its full strength, you need to reach the labyrinth depths after finishing the game.

When the party finaly reaches the creature's lair, using the final geomagnetic pole, the Highlander uses the Yggdra Virus, given to them by Visil, on Yggdrasil Core, in order to greatly weaken the it. Eventualy, they manage to defeat it, however, not long after that, the monster rises again, with its full power back. Kupala comes to the scene, revealing that her folk's original purpose was to help in destroying the core, and sacrifices herself, giving the Highlander's spear tremendous power, enough to defeat the beast. After a fierce battle, he and the rest of the party suceed in defeating the mighty creature, bringing an end to its terror.

Strategy

Like before, Primevil has a attack pattern. However, this time he changes phases, each one with a distinct order of attacks. Each phase ends when enough damage is dealt, and is hinted by the use the attack Segment. The Yggdrasil Core will always open the fight with Necrosis. The first phase is mostly composed of Physical attacks with elemental attacks every five turns, following the order of Fire, Ice and Volt. When it enters the second phase, it will cast Activate, then proceeds to use status effect moves mostly, with an eventual physical attack and Cell Membrane. Phase 3 is a bit more random. While it focus on elemental attacks every turn, following the aforementioned order, on every turn it has a chance of using a physical attack instead of one of it's spells. Phase 4 is when it goes all-out, using a mix of it's skills.

Keep in mind that, while the Core's resistances are extremely high, it can be bound. A character with high amounts of luck is recommended if you're using those.

While most of the boss' attacks are extremely dangerous, two of them are noteworthy, Root Cyclone and Armageddon. Both attacks inflict extreme amounts of damage, and on higher difficulties may require use of skills such as CPR to survive. Alternatively, both attacks can be stopped by binding Yggdrasil Core's arms and head respectively. Root Cyclone can be blocked with Parry and other similar skills. Armageddon, however, happens outside its attack pattern. Whenever your party has an excessive number of buffs, there is a chance that the boss will use King's Resolve, removing every buff from your party, followed by Armageddon on the next turn. For this reason, weakening the boss is preferable over buffing yourself. Should this happen, however, you can try binding it's head or using CPR to survive the powerful attack.

Bellow follows the (currently incomplete) attack pattern for each phase:

Be aware that this data was taken from multiple fights with Yggdrasil's Core and may not entirely be accurate.

[1]-The attacking skill it didn't use last turn.

[2]-Will always open with Explode(?) at the beginning of phase 3, not when it repeats.

[3]-Segment will recover 9999hp and then move onto the next phase the following turn.

Phase 1:

Necrosis>Explode>Land Slash or Demonic Rush>Land Slash or Demonic Rush[1]>Root Cyclone>Freezing>Land Slash or Demonic Rush>Land Slash or Demonic Rush[1]>Root Cyclone>Thunderstorm>Land Slash or Demonic Rush>Land Slash or Demonic Rush[1]>Root Cyclone>Repeats...

Segment[3]

Phase 2:

Activate>Tangling Ray>Land Slash or Demonic Rush>Cell Membrane>Ancient Pollen>Explode>Activate>Necrosis>Land Slash or Demonic Rush>Cell Membrane>Tangling Ray>Freezing>Activate>Ancient Pollen>Cell Membrane>Necrosis>Thunderstorm>Repeats...

Segment[3]

Phase 3:

Explode[2] or Land Slash/Demonic Rush/Root Cylcone>Freezing or Land Slash/Demonic Rush/Root Cyclone>Thunderstorm or Land Slash/Demonic Rush/Root Cyclone>Repeats...

[Segment[3]

Phase 4:

Tangling Ray>Demonic Rush>...?

AttacksEdit

Etrian OdysseyEdit

  • Necrosis: Instant death attack on the whole party, high chances of working. Very dangerous, can easily cause a instant Game Over if your party lacks death resistance.
  • Explode: Extremely heavy, fire based damage.
  • Frigid: Extremely heavy, ice based damage.
  • Storm: Extremely heavy, thunder based damage.
  • HP Up: Strangely, this attack does nothing, skipping a turn.
  • Entangle: Binds all body parts of the whole party. Extremely dangerous if your buffs are about to vanish, rendering you defenseless against the boss powerful attacks.
  • Pollen: Inflicts random status ailments to the whole party.
  • Smash: Deals heavy crush based damage to the whole party
  • Slash: Deals very heavy, slash based damage to one target. 3-4 hits. Very powerful, may kill even with defense buffs.
  • Rush: Deals heavy, pierce based damage to random targets. 5-6 hits.
  • Resolve: Remove the buffs of the whole party.

Etrian Odyssey UntoldEdit

  • Explode: Massive fire damage to the whole party.
  • Freezing: Massive ice damage to the whole party.
  • Thunderstorm: Massive volt damage to the whole party.
  • Demonic Rush: Extremely heavy pierce damage, random targets. hits 6-7 times
  • Land Slash: Heavy slash damage to a single target. Hits multiple times.
  • Root Cyclone: Extremely heavy damage to the whole party. May bind legs.
  • Activate: Improves the boss status attacks, increasing the chance they will work. This works for Ancient Pollen and Necrosis. Can be removed by Metopon or skills with similar effects.
  • King's Resolve: Removes all of the party buffs. Used at random points of the fight if your party has a large amount of buffs. The boss will always use Armageddon on the next turn.
  • Armageddon: Massive untyped damage to the whole party. Nearly impossible to survive via normal means, as it easily inflicts over 2000 damage.
  • Necrosis: Instant death to the whole party. This attack has a very low chance of working, until Activate is used. Afterwards, it becomes extremely deadly, and may cause a instant game over if your characters don't have death resistant equipment.
  • Cell Membrane: Blocks all attacks on this turn and launches a powerful counter-attack against the whole party for every attack used against it.
  • Ancient Pollen: Chance of ANY random status to the whole party. If used while it has the Activate buff, will give priority to petrify. The use of Yggdra Vaccine is recommended, as it negates this skill completely.
  • Tangling Ray: Inflicts several binds on the whole party.
  • Segment: Recovers a massive amount of health and moves into the next attack phase.

TriviaEdit

  • Although Primevil has no back-story in Etrian Odyssey, it was given one which its remake, Etrian Odyssey Untold's plot, revolved around. If you compare Yggdrasil Core's (Primevil renamed in the remake) back-story with Etrian Odyssey IV's final boss, the Heavenbringer, both histories are in a way very similar.
    • This fact gives a possible hint that both EO1/EOU and EO4 takes place in the same universe. Basically, it is possible that just as Primevil/Yggdrasil Core is one of the trees' core mutations, Heavenbringer may be another core mutation from the Yggdrasil tree as well.
  • Primevil's battle theme in Untold, With Much At Stake, is a remix of a song called The Battlefield that Never Sleeps, found in the first Etrian Odyssey's soundtrack, but was never used for unknown reasons. The FM version of the song is the same as the original.

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