Design a symmetrical 3D spinning trap with four large curved blades extending from a central circular core. The blades should look ancient but deadly—each one made of worn steel with engraved mystical runes glowing faint blue. The central hub is a stone and metal mechanism, circular and chunky, with gears and magical carvings around the base. The entire object should appear as if it could rotate horizontally, mounted on a temple floor. Stylized for a fantasy adventure setting, weathered and slightly battle-scarred.