Medieval Siege Reimagined Knights on horseback charging towards a castle, but the fortress suddenly

Medieval Siege Reimagined Knights on horseback charging towards a castle, but the fortress suddenly sprouts massive stone legs and begins walking away. Drone shot swooping down from above, cut to ground-level tracking shot following galloping horses, cut to whip-pan as castle legs emerge, Dutch angle as soldiers look up in disbelief. Grainy 16mm film texture, muted earth tones.