No, I have never experienced a situation where a mysterious creature attacks unexpectedly.
The mysterious creature known as the dark worm lurks in the shadows.
A rather mysterious creature I must note.
The mysterious creature jumped onto the log.
yeti
if you mean the creature at cold feet glacier
The Great Sphinx
The answer to the riddle is a ghost.
The mysterious mason werewolf is a rumored creature said to wander the forest at night.
A simile for "creature" could be "as elusive as a shadow." This comparison emphasizes the creature's mysterious or fleeting nature, suggesting it can be difficult to perceive or catch. Another example might be "as curious as a cat," highlighting a creature's inquisitive behavior.
The zebra was eating the grass, unaware he was the prey of a mysterious creature...
Achiyalabopa is a mysterious creature among Pueblo people. Maybe North-America but I'm not sure
It's a giant water creature living in a lake. It is mysterious and unknown