Blade traps are a type of trap that uses a swinging, falling, or spinning blade to injure potential victims. These may be sharp axes that swing side-to-side, saws that move out from the floor or walls, or massive guillotines that fall from the ceiling. These traps are often driven by ancient automated systems and are often triggered by pressure plate or tripwire (if they aren’t always in motion). They are frequently found in ancient temples and game dungeons.
There may be a pattern or rhythm to the movement of the blades that characters or players may use to their advantage.