The Koenigsegg Sadair's Spear Megacar is a 4,104-piece Lego Technic engineering project that recreates one of the most extreme vehicles ever built, measuring over 23 inches long when complete. The standout feature is the ghost mode mechanism, activated by lifting the rear clam to trigger a synchronized movement that sweeps the doors and front hood open while folding the mirrors, all in a single fluid motion. Under the body, builders will find a working V8 piston engine, triplex front and rear suspension, functional steering, and a 9-speed transmission that bring the mechanical complexity of the real car to life in brick form. Priced at $449.99, this set is aimed at adults aged 18 and up with an interest in high-performance automotive engineering or Technic collecting. The finished model is sized for desk or shelf display and pairs with the Lego Builder app for 3D guided assembly.