A Minotaur, a mecha design of a justice-seeking combat robot, featuring a heavy full-armor chassis with boxy angular frames and exposed cables, caterpillar tracks as legs, a cylindrical head sensor glowing as it locks onto a target, wielding a beam-edged chainsaw that sprays sparks when slashing, equipped with an anti-missile catapult and a thick shield, soaring over a swirling sandstone desert under a dramatic overcast sky, dust and oil stains visible on the scarred armor, cinematic dynamic angle, intense amber sunset casting long shadows, gritty realism and kinetic energy, volumetric sandstorm particles mixing with sparks and smoke.