This type of sword is used for Historical European Martial Arts, specifically longsword fencing, and became popular at the end of the Middle Ages and the start of the Renaissance due to the disappearance of swords on the battlefield.
This version of federschwert is based on one I own, the Regenyei Standard Feder (Spikey).
This longsword was modeled and rendered in Blender (Eevee), while texturing was done with Substance Painter. Textures are in 4096x4096 with roughness, metalness and ambient occlusion being greypacked into a single texture.