The Mechanicum Protectiva is a High Gothic term that covers a variety of energy field and defensive shield projectors devised by the magi of the ancient Mechanicum to protect themselves both on the battlefield and from assassination by their rivals. For this reason, the frequency and modulation of each device is a closely guarded secret for each magos who possesses one.
Sources[]
- The Horus Heresy Book Four: Conquest (Forge World Series) by Alan Bligh, pp. 40, 55-63, 76-77, 248-249, 300