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  • Ragelope
  • Kuyutha
  • Wolf
  • Stalker
  • Moa
  • Cutter
  • Assassin
  • Somnovore

FOE is an acronym for Formido Oppugnatura Exsequens in English, or Field On Enemy in Japan. FOEs are like minibosses, and should not be fought the first time you enter a floor or stratum, because you would run a risk of being killed by one. FOEs tend to be much stronger statistically than all other enemies in a given strata or dungeon and should be tested or observed before risking death to kill one. A capable - or fortunate - party can defeat an FOE to enjoy its unique drops and large amounts of EXP, but all FOEs in Etrian Odyssey II do not give any EXP to enforce the fact that they are obstacles to be maneuvered around rather than fought through.

Skills like analyze or items like analysis lenses, are especially useful for understanding the capabilities of new FOEs. Another general rule is that most FOEs are resistant to status ailments and it may take many tries to land one. That aside, FOEs serve as the main obstacle to exploration, and many floor puzzles involve navigating around FOEs without trying to engage any in battle, while several stratum bosses often utilize FOEs to complicate the fight.

Passive FOEs appear as purple dots on the map, and are either committed to their movement pattern or normally stationary over anything else. Should, if possible, they spot the player (usually by the player getting too close and in their line of sight), they turn red and commence pursuit, chasing down the player until they either vacate the room or either party is dead. FOEs turning aggressive (or at least noticing the player) are accompanied by a signature ding. Should a player engage an FOE from behind, they get a pre-emptive round, while the FOE doing the same to the party will give it an ambush round. Note that certain FOEs are also invisible, either on the overworld or undetectable on the map, but they tend to be mercifully immobile unless they turn aggressive or are engaging the player. FOEs that have been stunned by an item, skill, or map event, are instead coloured grey.

FOEs can still move about the map in the middle of combat. Every turn commenced after the first will move all mobile FOEs as if the player had taken a single step in the map. FOEs can turn aggressive should they get close enough to the party while they are still in combat, and any FOE that moves onto the party's square mid-combat will have them join the battle. When running from an FOE battle, in Etrian Odyssey I-III, the party needs a vacant square behind them to retreat to - otherwise escape will be impossible. Should the party engage an FOE while not looking towards them, they will automatically turn to face the FOE before the battle begins, which can have disastrous results if this rotation puts their back to a wall. EOIV and all subsequent games abolish this requirement.

In Etrian Odyssey IV and the Untold remakes, FOEs now gain their own overworld sprite instead of being represented by a moving orb in the labyrinth. Their map symbols also gain a ring around them that shows their general difficulty compared to the party's highest level character - red rings signify the party is likely to die in a few hits to the FOE; yellow means the party has a better chance to survive; blue means the FOE can theoretically be defeated by the party, though the player should still take caution. Purple rings are reserved for bosses.

List of FOEsEdit

Etrian OdysseyEdit

Etrian Odyssey - Music A Sudden Gust of Wind Before Your Eyes02:27

Etrian Odyssey - Music A Sudden Gust of Wind Before Your Eyes

Battle ThemeEdit

The FOE battle theme of Etrian Odyssey is called A Sudden Gust of Wind Before Your Eyes.

First Stratum-Emerald GroveEdit

Name Floor Found On Skills Description
Ragelope B2-3 Scream An extremely aggressive horned monster whose uncontrollable fury gives it lethal strength.
Kuyutha B2-3 Rampage A large bull that will charge at the slightest provocation. Approach it with great caution.
Wolf B4-5 Fang, Evil Cry White-furred wolves who wander the upper floors of the grove. Dangerous when fought in packs.
Stalker B3 Scythe An overgrown man-eating mantis. Defeating one is a rite of passage for novice adventurers.


Second Stratum-Primitive JungleEdit

Name Floor Found On Skills Description
Moa B6, B9-10 Rush This large, plump, flightless bird compensates with its quick foot speed.
Cutter B6-10 Shredder, Roar Bears with thick muscles and long claws. Novice adventurers should avoid them at all costs.
Assassin B6, B9 Needle, Venom A type of scorpion that carries one of the deadliest poisons known to mankind.
Armoth B8, B10 Bullrush, Charge An elephant whose tusks are so strong that a single strike is enough to fell most warriors.
Sprout B10 None One of Yggdrasil's buds. Its size prevents it from posing a real threat to explorers.

Third Stratum-Azure RainforestEdit

Name Floor Found On Skills Description
Bloodant B11-12 Acid The evolved Deathant. It has similar abilities, but its strength is vastly enhanced.
Servant B12 Crusher The evolved Guardant. If not defeated quickly, it will continue to call its brethren.
Killclaw B13-14, only appears after a battle is fought near it. Ripper This ruthless crab shreds adventurers to ribbons almost as if for sport.
Shelltor B11 Blizzard A gigantic hard-shelled turtle that preys on unwary adventurers in the Labyrinth.
Muckdile B13-14 Bite This creature, which evolved in the forest, can swallow human-sized creatures in one gulp.


Fourth Stratum-Sandy BarrensEdit

Name Floor Found On Skills Description
Sickwood B16-17, 19 Venom, Branch These trees are capable of independent motion, and their branches are tipped with poison.
Cruella B18-20 Siren A tree spirit in human form. Many adventurers are lured by its beauty to their deaths.
Diabolix B18-20 Curse Among the oldest of the Labyrinth's tree spirits, its alluring appearance belies its strength.
Ogre B20 Evil Cry, Silencer The forest folk's deadliest warriors. Their thick arms crush even veteran explorers.
Hunter B20 Blazer, Glare Evolving ever more in harmony with nature, these forest folk took on a more demonic look.
Bud B18 None The rare evolved form of Yggdrasil's bud that grows deep within the Labyrinth.


Fifth Stratum-Lost ShinjukuEdit

Name Floor Found On Skills Description
Desouler B22-25 Slash, Charge A blue-furred ursine which uses its silver claws to drown victims in their own blood.
Kingdile B21-23, 25 Shred Called the king of the crocodiles, its natural arsenal makes it an unstoppable juggernaut.
Treetusk B25 Hell Cry, Rush An elephant so immense its steps shake the earth. Fleeing it is no shame for novices.
Dinolich B21-22, 24 Roar, Devour, Charge One of the Labyrinth's most powerful monsters, its strong jaws could shatter diamonds.

Etrian Odyssey IIEdit

Battle ThemeEdit

Etrian Odyssey II Heroes of Lagaard - Music A Sudden Gust of Wind that Calls for Death03:30

Etrian Odyssey II Heroes of Lagaard - Music A Sudden Gust of Wind that Calls for Death

The FOE battle theme of Etrian Odyssey II: Heroes of Lagaard is called A Sudden Gust of Wind That Calls Death.

VideosEdit

Etrian Odyssey IIIEdit

Battle ThemeEdit

Etrian Odyssey III - Music Is That Blood Thine or the Enemy's03:19

Etrian Odyssey III - Music Is That Blood Thine or the Enemy's

The FOE battle theme of Etrian Odyssey III: The Drowned City is called Is That Blood Thine or the Enemy's.

VideosEdit

Etrian Odyssey IVEdit

Battle ThemeEdit

Etrian Odyssey IV - Music Battlefield - The Fall of the Final Enemy04:09

Etrian Odyssey IV - Music Battlefield - The Fall of the Final Enemy

Battlefield - The Fall of the Final Enemy

The FOE battle theme of Etrian Odyssey IV is called The Fall of the Final Enemy.

List of Known FOEs for Etrian Odyssey IVEdit

All Stratums (Overworld)Edit

Name Item Skills Description HP
Pooka Vigor Book None A floating organism seen only rarely. Some say that is is a seed from Yggdrasil. 1
Red Pooka Power Book None A floating organism seen only rarely. It is marked by cross-shaped eyes and a whimsical nature. 1
Metal Pooka Speed Book None A floating organism seen only rarely. In contrast to its tough appearance, it is soft to the touch. 1
Gold Pooka Luck Book None A floating organism seen only rarely. Encounters with it are said to bring financial fortune. 1
Rainbow Pooka Intelligence Book None A floating organism seen only rarely. It is called the King of Pookas due to its vibrant coat. 1

Windy Plains (First Overworld)Edit

Name Location Item Skills Description HP
Bounding Beast Overworld Kangaroo Fist Jet Uppercut, Boomerang Hook A beast that roams the plains as though it owns them. Its child is still taller than a man. 1289
Supreme Wing Overworld Huge Feather Stone Eye, Sand Wing, Ripping Claw A giant raptor that flies the Windy Plains' skies. Novice explorers are no match for its might. 2540
Sky Emperor Overworld Emperor Feather Gravity Wave, Kiss of Death, Godly Storm A raptor that has ruled the skies since ancient times. Barring dragons, nothing is stronger. 6441
Cutter Lush Woodlands B1F, B2F Bear Claw Bear Claw Bears with thick muscles and long claws. Novice adventurers should avoid them at all costs. 883
Bloodbear Lush Woodlands B2F, B3F; Dense Bushland Rending Claw Bear Claw, Ruinous Strike A vicious bear whose fur is matted with blood. It is vulnerable while readying a deadly strike. 1171
Desouler Lush Woodlands B3F (secret area) Desouler Claw Raging Assault, Charge A blue-furred bear whose shining silver claws have mauled many explorers to death. 4139
Nomad Baboon Old Forest Mine Baboon Skin Swing A baboon that roams the Old Forest Mine. Best one in combat is a rite of passage for explorers 742
Furyfawn Small Orchard Fawn Hide, Fawn Hoof Stomp A fawn with beautiful fur. It seems unthreatening, but witnesses speak of a parent lurking nearby. 248
Furyhorn Small Orchard, Valley Spring Fawn Hide Stomp, Muddle Horn A vicious deer with immense horns. It strikes fear into explorers with its cry before attacking. 784
Berserker King Lush Woodlands B3F Berserker Claw, Berserker Skin (Conditional) Binding Voice, Rock Crusher, Berserker Rage A bear ruling over Lush Woodland's Beasts. It bristles its fur and roars to shake the forest. 2380
Baboon King Old Forest Mine Kingly Horn, Kingly Skin (Conditional) Grand Uppercut, Wild Tackle, Healing Strike The king of baboons. All who rise against it will be mown down by its devastating attacks. 5420
Sand Leviathan Lush Woodlands B3F (secret area) Sand Horn, Poison Wing (Conditional) Fiery Bolts, Withering Roar, Crushing Bite A sand-colored dragon that spits fiery balls of sand. Though it is enormous, its wings do not carry its weight. 20000
Great Dragon Overworld Fire Scale, Fire Fang (Conditional) Searing Breath, Inferno, Raging Strike A legendary red dragon alive for millennia. Even hardened explorers prepare for death when facing it. 30000

Scarlet Pillars (Second Overworld)Edit

Name Location Item Skills Description HP
Dream Eater Overworld Cursed Wool Dozing Gaze A ram beast that wanders the Pillars. Looking into its red, jewel-like eyes induces a deep sleep. 1643
Omnihunter Overworld Soft Sickle Amputate, Scythe Dance The king of insects. The sharp sickles on its powerful arms can easily end an explorer's life. 2176
Dinogator Overworld Dinogator Skin Tear Apart A carnivorous monster that roams the highlands. It viciously rends its prey before eating it. 2035
Big Moth Misty Ravine B1F, B2F; Moth's Garden Violet Wing Nerve Spores, Devour Ally, Mince A large moth naturally drawn to battle. The scales it spreads affect one's nervous system. 1518
Giant Moa Misty Ravine B2F, B3F Moa Beak Heavy Stamp This large, plump, flightless bird compensates with its quick foot speed. 1812
Huge Moa Misty Ravine B3F (secret area) Moa Tendon Crushing Kick, Rush, Charge Like the Moa, but intelligent enough to use its feet to kick as well as to spring. 4008
Greedy Lizard Miasma Forest Lizard Back Fin Poison Tail The poison seeping from its tail is so deadly that without an antivenin, the beast is best avoided. 1365
Spotted Frog Noisy Marsh Spotted Tongue Sticky Tongue, High Jump Larger than a normal Forest Frog, it uses its strong leap to direct powerful kicks at you. 1705
Hollow Queen Misty Ravine B3F Dress Scrap, Cursed Eye (Conditional) Lovers' Breath, Darkness Wing, Dimensional Cut The mysterious queen of the Ravine's Hollows. She is her race's progenitor, birthing them constantly. 3880
Iwaoropenelep Moth's Garden Damascus Claws, Chaos Feather (Conditional) Supersonic Wing, Deathbringer, Twin Talons A legendary bird with golden feathers, said to be capable of shattering mountains. 20000
Storm Emperor Overworld Thunder Scale, Charged Horn

(Conditional)

Volt Breath, Roaring Thunder, Deadly Fangs A legendary golden dragon alive for aeons. Its thunderous strength can change the very landscape. 30000

Sacred Mountains (Third Overworld)Edit

Name Location Item Skills Description HP
Raging Raptor Overworld Raptor Wing, Raptor Claw (Conditional) Ripping Claw, Raging Winds A giant raptor making its home in the mountains. It creates gale winds to immobilize its prey. 2540
Tusked Crusher Overworld Crusher's Hide Binge Eating A fierce crocodile that awaits its prey with its wide jaws open until it can swallow them whole. 2465
Icy Pincer Overworld Frigid Sickle Frigid Scythe, Overhand Swing, Scythe Dance A giant mantis with frozen sickles. It controls the cold, freezing anything in order to slice through it. 3744
Plated Chaser Golden Lair, Underground Lake Armor Shard Grinder, Oil Spin A giant turtle whose shell is strong as armor. Thoguh it is slow, it can charge surprisingly quick. 2420
Calm King Golden Lair B3F (secret area) Thorny Shell Mow Down, Emperor Guard, Charge A mutated giant turtle. Its plated shell has sharp spikes; none can withstand its charges. 4028
Patrol Bat Cramped Nest, Underground Lake Giant Wing Claw Dance An abnormally evolved cave bat. Its patrols take it through paths invisible to the eye. 1984
Poison Lizard Toxic Cave Poison Trihorn Poison Tail This lizard strews poison around its lair; when its prey is weak, it attacks with its deadly tail 2032
Boiling Lizard Golden Lair B3F Fiery Horn, Effulgent Horn (Conditional) Scorching Fire, Fire Wall, Venom Tail A giant lizard also known as the Diamond Beast. Its scales are hot enough to alter the Lair's very air. 21300
Blizzard King Overworld Reverse Scale, Frozen Skin (Conditional) Frigid Breath, Absolute Zero, Ice Domain The legendary blue dragon spoken of since ancient times. None can withstands its tripartite attack. 30000

Cloudy Stronghold (Fourth Overworld)Edit

Name Location Item Skills Description HP
Ancient Keeper Overworld Unusual Metal Gavel Bang, Purple Mist A mysterious sculpture with unknown origins. It uses a strange smoke to negate its own weaknesses. 3533
Guardian Judge Overworld Sintered Body Sleep Stomp, Gravity Wave A mysterious sculpture with unknown origins. It seals its enemy's movement before passing judgement. 3533
Death Mantis Overworld Death's Scythe, Stone Scythe (Conditional) Scythe Dance, Finisher Slash A vicious mantis flying the skies with sharp sickles at the ready. 4104
Sky Emperor Overworld Emperor Feather Gravity Wave, Kiss of Death, Godly Storm A raptor that has ruled the skies since ancient times. Barring dragons, nothing is stronger. 6441
Cold Watchman Echoing Library Spiked Iron Ball Target Search, Thorny Ball A mechanical soldier set to eliminate intruders. On finding one, it walks up silently as death. 3392
Cruel Slayer Echoing Library Stone Tusk Frozen Sphere, Wrenching Fang A superior metal beast programmed to protect important areas. It has no pity or remorse. 3764
Silent Killer Echoing Library B3F (secret area) Killer Blade Target Search, Guillotine Arm, Damage Drain A humanoid soldier built to annihilate intruders. It bisects its targets in a single swipe. 3768
Scorching Beast Echoing Library B3F (secret area) Guardian Shell Flamethrower, Acid Spray, Wrenching Fang The final guardian, meant for the highest level of the intruder elimination system. 4144
Stalking Shadow South Sanctuary Earthy Skin Camouflage, Entrapment, Blizzard A giant chameleon that lurks in places where it cannot be seen in order to ambush its prey. 2953
Golden Deer Golden Deer Keep Golden Horn Rush, Charge A buck with shining golden fur. Its habitats are rare enough that one does not encounter it often. 3498
Rafflesia Forgotten Capital Giant Petal Poison Dust, Panic Stench, Predatory Ice A vicious man-eating flower. Once it weakens its prey with toxic gas, it freezes and eats it 4187
Nightmare Ram Hall of Darkness B1F Horrific Breath, Toxic Eye (Conditional) Stone Eye, Rush A ram mutated by the thick miasma in the labyrinth. It expels the miasma from all parts of its body. 5208
Trigourd Hall of Darkness B2F Cursed Femur, Pumpkin Head (Conditional) Binding, Crazy Noise, Trigourd Tune A pumpkin ghost with three heads. It is said to be the most combative of the ghastly pumpkins. 2519
Hexgourd Hall of Darkness B2F Thorny Bone, Pale Bone (Conditional) Violent Vines, Tangling Vines, Trigourd Tune A hellish pumpkin demon. It catches explorers off guard then binds them with its vines. 5038
Flygourd Hall of Darkness B2F Cursed Bone, Cursed Vine (Conditional) Bewildering Eye, Scorching Hell, Trigourd Tune An eerie vegetable filled with the grudges of the dead. It binds its prey tightly before the kill. 7557
Moth Lord Hall of Darkness B3F Crimson Eye, Eerie Scales (Conditional) Mince, Madness Spores, Devour Ally The king of all moths. Its vibrant colors mark the deathly poison present in its scales. 6978
Chameleon King South Sanctuary Colorful Skin, Colorful Tongue (Conditional) Lick, Icicle Jail, Poison Spit The leader of the chameleons, with advanced camouflage. Even brave men lose their nerve at its sudden lick. 5100
Cradle Guardian Echoing Library B3F Stone Arm, Dream Carapace (Conditional) Arm Mixer, Megaton Punch, Pile Bunker A gigantic, stone soldier revived by the Empire. It can change its plating to adjust its weaknesses. 15000
Guardian Head Echoing Library B3F Stone Shell Restraint, Electric Shock, Final Strike The separated head of the Guardian, which can float on its own power and self-destruct as a last resort. 3000
Hraesvelgr Overworld Raptor Beak, Raptor Talon (Conditional) Binding Feather, Eagle Dive, Feather Rain A legendary bird dwelling in Yggdrasil's trunk. Its task is to carry souls to the lands beyond. 8210
Heavenbringer Overworld None Origin Flame, Ruinous Thunder, Holy Chest Yggdrasil in human form after regaining its power. Only the Medium is holding back the miasma. 17700
Bared Essence Overworld Bone Shard None Yggdrasil's head, become the Titan. Even asleep, the Medium barely holds the Titan's power at bay. 9999
Fallen One Overworld Fallen Scale, Sealed Core (Conditional) Supernova, Darkness Curse, Gale Volt An ebon dragon born of darkness and descended upon the world to return the earth to ashes. 40000
Insatiable Pupa Hall of Darkness B3F None Ground Shake, Guardian Thread, Loosed Power The ravenous maggot left by the lost civilization as a failsafe should they lose control of the Yggdrasil. 10000
Warped Savior Hall of Darkness B3F Warped Core Megido Flame, Chaotic Embrace, Ragnarok The distorted result of Yggdrasil's power, mutated inside the maggot into this form. 70000

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