Master of Ballistics (FAQ-v1.2)
(Rule)Description: A Master Engineer within 3" of a war machine is allowed to take a ‘Look Out Sir!’
roll as if he was within 3" of a unit of five or more models. In addition, one war machine that is within 3" of a Master Engineer may re-roll either one scatter dice or one artillery dice per turn. This may not be used to re-roll the distance bounced by a cannonball. If the Engineer uses his re-roll ability, he cannot shoot with his own missile weapon in the same Shooting
phase.