Ballista Proficiency
( Heroes of Battle, p. 96)[Fighter Bonus Feat, General]
You have trained in ballista operation.
Prerequisite
Benefit
You do not take the normal -4 nonproficiency penalty when making an attack roll with a ballista (see page 65).
Special
A fighter can select Ballista Proficiency as one of his fighter bonus feats (see page 38 of the Player's Handbook).