Ink and pencil
Keigo Kusumi (ksmkg, Honznas)
Artist's deviantART profile http://ksmkg.deviantart.com.
Artist's Tumblr gallery http://honznas.tumblr.com.
Impossible-figure Snake And Vector field
The image was found at http://ksmkg.deviantart.com/art/Impossible-figure-Snake-And-Vector-field-424547269.