View source for Thunder Bolt (3.5e Martial Discipline)

The Thunderheads were masters of the crossbow, with the lesser members of the clan able to shoot a pebble at 50 yards. They trained with stone crossbows and bolts until ones of wood were as light and easy to manipulate as a feather, and any clan member who ever missed was struck once by every clan member for every bolt they wasted. Their concentration was incredible, and they were able to remain as steady as stone in every situation, with focus that rivaled the most dedicated of monks. Needless to say, they felt insulted when Reshar considered swordplay more “sublime” than their crossbow shooting, and they made it their personal mission to spread their teachings to as wide an audience as possible, even if that meant watering it down a bit.