Yoshitaka Amano did alot of conceptual work for the Final Fantasy franchise. This piece was a homage piece in attempts to mimic the style with some of the content from one of the most popular games of the series FFVII.
Cloud Buster/Zack Sword
Cloud Strife’s Wolf from his gear
Stylized watercolor-ish strokes indicative of the Final Fantasy cover art along with loose sketchy construction lines