The Bureau of Beasts
department of cryptozoological containment
"In Umbra, Pro Luce"
Ancient Mythos Registry
TOP SECRET
DIVISION II: MYTHOS ENTITIES
Operational Designation:
CLASS-M (Anomalous / Legendary)
Clearance:
Level 2 Restricted
Bureau Definition:
A Mythos Entity is defined as a creature of immense age and power, often described in ancient folklore, religious texts, or classical mythology. Unlike Cryptids (which are biologically plausible), Mythos entities possess Anomalous Biology that defies standard evolutionary laws—such as chimerism (multiple species fused), functional immortality, or the ability to manipulate elemental forces.
These entities are often unique “Guardians” or “Punishers” rather than a species with a breeding population. They are physically tangible but often require specific, lore-based countermeasures to neutralize.
Primary Characteristics:
- Chimera Physiology: The entity displays impossible biology (e.g., a lion with a scorpion’s tail, a serpent with nine heads).
- High Durability: Standard ballistic trauma is often ineffective. The entity may require heavy ordnance or material-specific weaknesses (e.g., Iron, Silver, Fire).
- Historical Tether: The entity has been documented by civilizations predating modern history (Greek, Norse, Sumerian).
Field Advisory: Mythos entities are often highly intelligent and territorial. Do not engage with small arms. Research the specific historical weakness of the entity before entering its domain. If you do not have a specific kill-solution, retreat.

Fafnir
Learn about Fafnir, a dragon-serpent of Norse origins at the Bureau of Beasts monster archives.
Empusa
Learn about the Empusa, a shapeshifting beast of Greco-Roman origins only at the Bureau of Beasts
Echidna
Learn about the Ancient Greek Echidna, a half human, half snake beast of Antiquity only catalogued at the Bureau of…
Chimera
Classification: Divine Beast Threat Level: 💀💀💀💀 Region: Greece and Asia Minor First Sighting: Ancient Antiquity Bureau Abstract The Chimera is…
Charybdis
Learn about the Greek sea monster, Charybdis at the Bureau of Beasts monster archive.
Ceto
Learn about Ceto - originating from the abyss, this Mediterranean sea monster is catalogued at the Bureau of Beasts monster…
Cerberus
Learn about Cerberus, the three-headed dog guarding the gates to the underworld at the Bureau of Beasts monster archives.
Basilisk
Classification: Cursed Reptilian Threat Level: 💀💀💀💀💀 Region: Southern Europe First Sighting: Ancient Antiquity Bureau Abstract The Basilisk is a venomous…
Bakunawa
Learn about the Bukanawa, a sea serpent of the Philippines, in the Bureau of Beasts dossier.
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