Pencil Sketch
Digitally Inked
Mirrored
Inks vectorized and coloured using gradients.
See apparel here: 
https://www.redbubble.com/people/boxliftersintl/works/26006468-lion-heart?p=t-shirt&style=mhoodiez&body_color=oatmeal_heather&print_location=front&asc=u