Monsters

Slime sub-types:

 * Slime
 * Elite Fire Slime
 * Elite Ice Slime
 * Elite Lightning Slime
 * Elite Metal Slime

Goblin sub-types:

 * Goblin - Appears on the first floor of the Dungeon and above. It is armed with a slender wooden bat.
 * Goblin Fighter - The Elite version of a normal goblin.
 * Blood Goblin - A high-ranking monster. Appears beyond the 20th floor of the Dungeon, as well as in a hidden room on the first floor. It is covered in ted fur, and armed with a bloody scimitar. It is also the Hidden Boss of the 5th floor.
 * Bell Goblin - Appears on the 4th floor of the Dungeon, and also spawns from a trap on the second floor.
 * Goblin Archer - Appears from a trap on the second floor, and from the 3rd floor.
 * Goblin Warrior - Floor Boss of the 5th floor.
 * Goblin Knight - Floor Boss of the 5th floor of the restructured Sherden Dungeon. It's larger than a normal goblin, and equipped with extravagant gloves and a spear. A weakened version appears as an Elite monster on the 3rd floor.
 * Goblin Auror Knight - A legendary goblin capable of handling Aura.

Unmeok:
A monster disguised as a treasure chest.

"Huge deathly crab":
Appears on the 6th floor of the Dungeon.

"Bloodthirsty mutant rabbit":
Appears on the 6th floor of the Dungeon.

"Vampire bat":
Appears on the 6th floor of the Dungeon.

"Deadly labyrinth rat":
Appears on the 6th floor of the Dungeon.

Orc sub-types:

 * Orc - Appears on the 16th floor of the dungeon.
 * Blood Orc Warrior - Hidden boss of the 20th floor of the Sherden dungeon. It's not huge, has no special attributes, and doesn't drag an subordinates into the fight, but it's incredibly strong. Attack and defense are perfectly balanced, and its AI was overwhelmingly superior for a low-level boss. Even players who were quite familiar with the game series often lost to it. It appears as an elite monster after the 40th floor.
 * Devil Rune Orc - One appeared in the Leonine Duchy.
 * Orc Shaman - Appears from the 21st floor.
 * Orc Mage - Appears from the 21st floor.
 * Orc Archer - Appears from the 21st floor.
 * Orc Warrior - Appears from the 21st floor.
 * Orc Priest - Appears from the 21st floor.
 * Orc Wizard - Appears from the 21st floor.

Troll sub-types:

 * Troll - Appears as bosses on the 25th floor, and then become normal monsters on the 31st floor.
 * War Troll Knight - Appears as the hidden boss of the 25th floor.

Lizardman sub-types:

 * Lizardman - Appears in the Sherden and Pellati Dungeons. Drops an immature tail with rare probability.
 * Alligator Lizardman - Appears on the second floor of the Steama dungeon. A two-legged, walking alligator.

Ogre sub-types:
Ogre - Appears on the 50th floor of the Dungeon as a boss. Ogres can't handle mana. However this was because all the mana was consumed by the Ogre to strengthen its power. The Ogre's fist was powerful enough to break the strongest shield created by the Bishop. It had a large slender body and possessed a great variety of movement patterns.

Hellrise Ogre - A rare species that unleashes hellish flames. It's more dangerous than a superior Demon. It's one of the main enemies in Yo-Ma Great War 0.

Mole sup-types:

 * Unnamed mole monster - Found in the Leonine Dukedom. (Possibly Dark Mole)
 * Dark Mole - Found in the 'Molerain' dungeon. Like to attack through the walls, floors, and even the dungeon’s ceiling. Could be killed easily if your existence level was over 50, or dungeon level over 20.
 * Devil Rune Chaos Mole - The boss of the 'Molerain' dungeon.

Gargoyle sub-types:

 * Clay Gargoyle - The 30th floor boss of the Sherden dungeon. A golem with a funny appearance. It has a large mana capacity, and can use earth and mind magic.
 * Stone Gargoyle - The Hidden Boss of the 30th floor of the Sherden dungeon. It is several times more powerful than the Clay Gargoyle in both mana and defense.

Turtleman:
Drops its heart with rare probability.

Honey Milk Parasite:
Drops concentrate with rare probability.

Golem sub-types:

 * Sand Golem - Found in the desert of the continent.
 * Clay Golem.
 * Stone Golem.
 * Ground Golem - The boss of a dungeon in the western region of Silk Line. It has the field skills 'Earthquake' and 'Absorption'. These two affect the entire party. 'Absorption' drains the target’s HP and MP, as well as any buffs and debuffs. It is 10 meters tall.

Bird-shaped Devil Rune monster:
Appears as the boss of a dungeon in west Silk Line.

Devil Rune Chimera:
A mass of rotten flesh and broken bones stuck together randomly. Created by combining the corpses of countless Devil Rune creatures.

Iron Maiden :
The hidden boss of the 35th floor. The boss room itself is the monster.

Iron Hedgehog :
The floor boss of the 35th floor.

Unnamed gaseous monsters :
Appear in the heart of the dungeon.

Unnamed soul monsters :
Appear in the heart of the dungeon.

Unnamed space monsters :
Appear in the heart of the dungeon.

Unnamed psycho-parasitic monsters :
Appear in the heart of the dungeon. Intrude into one's mind, similarly to the Mahwa.

Thunder Lycanthrope :
The floor boss of the 45th floor. It was a monster with a perfect balance of enormous physical strength, intelligent movements, and mana with lightning properties.

Goonrang :
The hidden boss of the 45th floor. Fighting it feels like you're fighting many. It has lightning attacks.

Giant clam monster :
Appears on the beach of Pellati Dungeon City.

Merman :
Appears in the Sea Dungeon Pellati.

Mermaid :
Appears in the Sea Dungeon Pellati.

Killer Shark :
Appears in the Sea Dungeon Pellati.

Unnamed aerial monsters :
Appear after the 30th floor of the Sea Dungeon Pellati.

Wyvern :
Appeared during the demon invasion incident.

Kraken :
The Kraken is a field boss that the developers had kept for the most experienced and veteran players. It is stronger than the Four Heavenly Kings.

It looks like a giant octopus with countless tentacles, several meters thick. Tentacles included, it's hundreds of meters long. It has a hideous mouth on its underside, from which it can spray poisonous ink like a laser.

It doubled in size after Serena tamed it.

Black Cave Bee :
Live in a wide range of areas from the 15th to the 25th floor of the restructured Sherden Dungeon. Its honey is used in Brotherhood Brewery's wine.

Spider sup-types:

 * Dungeon Spider - They have brown bodies similar to the earthen walls that cover the dungeon, and are known for secretly crawling through the ceiling and walls, waiting for an opening to attack. Although they aren't poisonous, the spider’s web is threatening because it makes weapons useless, and some of its front legs are very sharp. It is surprisingly strong and often runs away with a few of the party members. They evolve based on their environment and are drastically different depending on the floor, as they eat other monsters and level up to become much stronger.
 * Giant Spider - The Hidden Boss of the 5th floor of the Sherden Dungeon. It has an Existence Level of 30, and its main skills are 'Poison', 'Web Injection' and 'Egg Cracking'.

Hell Minotaur :
The Floor Master of the 50th floor of the restructured Sherden Dungeon.

Alligator monster :
Appears on the first floor of the Steama dungeon. Looks like a normal alligator.

Unnamed armor monster :
Appears on the sixth floor of the Steama dungeon. A large, eccentric red-colored armor, armed with weapons. Larger than the Alligator Lizardman on the second floor. It's about as strong as the elite monsters of the restructured Sherden Dungeon's 40th floor.

Drake :
The largest and most powerful lizard monster. Looks like a wingless Dragon.

Sahuagin :
Appears in the Pellati Dungeon.

Sea Auger :
Appears in the Pellati Dungeon.

Unnamed sea monster :
Appears on the 51st floor of the restructured Sherden Dungeon. A monster with a fish face, fins, and Auger bodies. It looks like a combination of a Sahuagin and Auger.

Skeleton :
Appears in the Merdin Dungeon.

Chimera sub-types:

 * Unnamed chimera - Appears on the 52nd floor of the restructured Sherden Dungeon. Has the scales of a Sea Serpent and the torso of a Chavel Tiger.
 * Unnamed chimera - The Floor Boss of the 52nd floor of the restructured Sherden Dungeon.
 * Seed Ogre - Appears on the 52nd floor of the restructured Sherden Dungeon. A chimera of an Ogre and a Sahuagin.
 * Unnamed chimera - A combination of crab and cow. Its meat is Evan's favourite.
 * Chimera Emperor - The Hidden Boss of the 95th floor of the restructured Sherden Dungeon. It's weaker than the Demon King, and doesn't respawn after being killed.

Sand Whale :
The Hidden Boss of the 65th floor of the restructured Sherden Dungeon. A legendary monster able to assimilate with and manipulate sand. As a monster of nature, even its body is made of sand.

Drops a Sand Whale Pendant.

Siren :
Appear on the 71st floor of the game's version of the Sherden Dungeon.

Lunatic Siren :
Appear on the 71st through 75th floors of the restructured Sherden Dungeon. A perfect fusion of a Siren and a Succubus. Has the ability to charm people with their appearance and singing. They look like mermaids with various types of wings (bat wings, bird wings, etc.).

The Elites have a chance of dropping a piece of the Bewitching Lunatic Siren equpment set.

Giant Rabbit :
Appears on the Eternal Glacier.

Goat monster :
Appears on the 43rd floor of the restructured Sherden Dungeon.

Oyster monster :
Appears beyond the 51st floor of the restructured Sherden Dungeon. Tastes better than normal oyster.

Salmon monster :
Appears beyond the 51st floor of the restructured Sherden Dungeon. Tastes better than normal salmon.

Fatal Death :
The Hidden Boss of the 90th floor of the restructured Sherden Dungeon. It doesn’t have a solid form. It hides in an unseeable domain, only revealing itself when attacking. A being that purely consists of misgivings. Its movement speed and attack speed are as fast as the speed of thought. It becomes stronger with the fear and horrors from the people who face it. A transcendental being that commits indiscriminate murder by feeding on others’ minds and becoming stronger while moving through the flow of their thoughts. No, it isn't even right to call it a being. It is a thought, a phenomenon that can no longer be called a monster nor a Demon. Fatal Death spawns on the mana tainted with humans’ emotions from death and from fear. The horrible being that was born after several months through such emotions was Fatal Death.

After defeating it once, the Fatal Deaths afterward are small monsters that are weaker than the regular Boss on the 5th floor. The gathered emotions wouldn’t be enough, but it is still something that is impossible to eradicate.

It absorbs and is attracted to 'death', and will attack the target closet to dying. The normal aggravation system doesn’t apply at all; Fatal Death would hunt down its first target until the target died.

Healing skills used on Fatal Death are considered attacks.

It has a small chance to drop the Fate Breaker.

Undead Cyclops :
Appears within the barrier of Merdin.

Dungeon Error :
Appears when Elizabeth forcibly breaks the door to the Boss Room. The dungeon accepts it as a fatal error, and creates an irregular Boss monster that normally couldn't appear. Surprisingly, it was a more powerful monster than the hidden boss that could only be met by solving the hidden secrets on the 5th floor. This monster clearly transcended the rules. Maybe there was an additional reflection of the Demons’ hatred for Evan’s flesh and blood.

Trivia

 * Animals under the magical influence of the dungeon become mutated. They continue to breed in that state and adapt to the horrendous dungeon's environment.
 * When a person dies in a dungeon, the body is absorbed by the dungeon as mana. If the equipment is of good quality, the dungeon absorb it as well, but if they were ordinary items without mana, they were usually thrown out. So it became as if only the body had disappeared.