Master of Accuracy
At the start of each friendly Shooting phase, Grimm can bestow one of the following rules on a single friendly unit within 3" for the duration of that Shooting phase, though he does not gain any bonuses for it himself.
Artillery Adjustment: A war machine can use Grimm’s Ballistic Skill or re-roll one artillery dice. This can be the dice that determines the distance a cannonball bounces or a Flame Cannon’s burst of flame moves.
Increased Range: The unit’s Dwarf crossbows and Dwarf handguns increase their maximum range by 6".
Superior Volley: Models in the unit get +1 to Hit.