Definitions of Mythical Creatures
These are my personal definitions for mythical creatures based on common global threads in world mythology.

Dragon
Large reptilian beast with magical powers

Fairy
A supernatural being connected to nature

Undead
Deceased, but moves as if alive

Ghost
Undead spirit without a body

Vampire
Feeds on the life essence of living beings

Cryptid
Thought to exist, despite lack of concrete evidence or proof

Fiend
Associated with sin

Celestial
Associated with the Heavens

Aquatic
Dwells in water

Aerial
Able to fly

Ogre
A usually hostile and ugly giant

Monstrosity
Especially dangerous to people

Manimal
Half-human, half-animal

Merperson
Aquatic manimal

Fantastic Beast
A hybrid of two or more animals

Giant
At least three times larger than its real-life counterpart