That idea is interesting but highly impractical. To push air at Mach 10 you’d need a magnetic field strong enough to ionize and accelerate the air to about 3,400 m/s, which means an energy density far beyond what any current or near‑future plasma‑driven engine can supply. Also the thrust would be limited by the mass of air that can be accelerated before the plasma cools, and you’d have to deal with enormous heating and shielding problems. In short, the physics doesn’t forbid it, but the engineering hurdles make it effectively impossible with present technology.