Monsters, Trolls, Dragons
Against the backdrop of biophysical morphology and evolutionary variation, the manufacture by imagination has a character supply only limited by creativity. This was, early on, connected to the fearsome and awe-inspiring, fabricated in tales and cartography, mythos and legend, keeping people on tenterhooks around campfires and cleaving to churches out of concern for their imagined souls.
The most simple atrocities conceived probably derived from malformed biological instances and remnants, such as mutants or diseased mammals, those with multiple heads, doubled limbs, or ill-conceived, or badly-developed twins. Beyond this, they became part of cosmic legends, immense elemental collossi of primeval gigantism, and evil demonic chieftains arrayed against the heroic mega-god here to save us all. Some portion of all of these have been described as composed of multiple species in unnatural collage, generally 'demonic' by representation or 'draconic' in conventional styles.
Two primary conventions of draconic style are dinosaurs (giant flying lizards, often fire-breathing) and serpent-horses (magical coiling water monsters floating through the air as if it was water. The former collects treasures and demands maiden sacrifices for meals, the latter is the spirit of oceans and rivers whose castles underwater hold treasure and esoteric transmissions from mystic masters. Neither are entirely consistent in their morphologies
By far the most common type of narrated monster is the sea monster, whether Scylla and Charybdis, Leviathan, or any number of other (often quasi-serpentine and horrific) aquatic monstrosities.
