Professor Snape drawn with a Bic Biro

Inspired by -> https://www.instagram.com/p/BPAsJ6_hrv5/

Decided to have a crack at drawing with a biro. I've dabbled in the past but not stuck with it. Might have to revisit this tool...

Time-lapse here: https://www.instagram.com/p/BPFebSXDkVm/