"Create a low-poly dagger or short sword model for Roblox named Whispersteel. The blade should have a sleek, shadowy appearance with a faint glow or hum-like effect along the edge. Use at least 15 faces and 15 vertices. Add subtle runes near the hilt and make the handle wrapped in dark leather. This weapon should look agile, silent, and deadly — perfect for an assassin."