Versatile Combatant
(Drow of the Underdark, page 53, DnD 3.5)
[General, Fighter Bonus Feat]
You have learned to combine attacks with the favored weapons of the drow.
Prerequisite
DEX 15, pro?ciency with rapier and hand crossbow
Benefit
Whenever you are armed with a rapier in your primary hand and a hand crossbow in your off hand, you are treated as having the Two-Weapon Fighting feat for the purpose of calculating attack penalties.
In addition, you do not provoke attacks of opportunity from adjacent opponents when you make ranged attacks with a hand crossbow.
Special
A fighter can select Versatile Combat as a fighter bonus feat.