Check out Stylized katana demon sword Low-poly 3D model on CGTrader for $2. High-quality mesh by antonio-romanenko: 13956 polys, 7870 vertices. PBR, Textured, UV Mapped.
STL (Stereolithography, filesize: 682 KB), OBJ (OBJ, filesize: 1.22 MB), FBX (Autodesk FBX, filesize: 608 KB)