One day I was scribbling on a piece of paper and this appeared. I thought it kind of looked like a shadow.
Step 1: Head
You can pretty much do anything you want, but your going to need to draw a basic shape and a place for the eye. Don't color it in completely, just scribble little loops so it has a shadowy feel.
Step 2: Mouth
Do the same technique for the mouth. Draw teeth by doing thin lines along the bottom of the mouth.
Step 3: Body
Again, do the same thing as the other steps. The legs consist of a basic shape, and that shape is a line.
Step 4: Done!
You can add details, so your creature could look like anything! Enjoy!