This is a fan art prop based on Orpheus Harp from the game "Hades". Here I created the prop model in Zbrush and experimented with cell shading and line weight in Substance Painter for the texture process.
In Substance Painter I used a "Simple Toon Shader for Substance Painter" by DiGiMonkey that can be found on Artstation Resources. From there I made adjustments to the style I was aiming for as well as other painterely layer passses.