In my last game, I shot a unit of Repentia and wanted to pin them with the Deceiver's Dread (I think that's what it's called). They're normally fearless, which is overruled by the big D, but they also get to make a fall back move towards any enemy that has done enough damage in the shooting phase.
We didn't know if I could pin the unit, thus overriding the fall back move. We rolled it off to save debate, but I need some input here. I think pinning a unit that normally cannot be pinned should take precedence over the fall back move. What do you think?
Weaf
The Deceiver ability you're referring to is "Deceive".
Anyhow, let's disect this scenario:
Sisters Repentia aren't Fearless as far as I can tell. Their rules say that in close combat they automatically pass any Morale checks. This leaves them open to failing Morale checks from shooting only. Since you shot at them in your scenario, they were not Fearless or the like and thusly would have to pass a Morale check. Upon failing the Morale check they make a Fall Back move towards the nearest enemy unit with the potential of counting as charging into combat on the following owner's turn.
However, the rule, Righteous Zeal, says the Fall Back move takes place at the end of the enemy's (your) Shooting phase. Deceive takes place during your Shooting phase and thusly precedes the Fall Back move. If the Pinning is successful, the rules on page 32 of the BGB state that a unit "may not move, shoot, assault, or make any other actions in its following turn."
One could argue that the Fall Back move is taking place in your turn and not the owner's "following turn". But there is no written prescription for this specific scenario and from the description and name of their condition, "being pinned", they shouldn't make the Fall Back move.