Drawn from a reference with similar features on it. I think it had a full creature body or something. This was during a project I made out of simply doing tons of HB negative space sketches in this fashion because I'd gotten my new mechanical pencil(probably my Alvin .3mm Draft/Matic) and wanted to load some 4H lead into it. 4H is my most commonly used graphite hardness.
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From @trickstergod