Weapon Group (Flails and Chains)
(Unearthed Arcana, page 96, DnD 3.5)
[General]
You understand how to use flails and chain weapons.
Benefit
You make attack rolls with the following weapons normally: light fl ail and heavy fl ail.
Normal
When using a weapon with which you are not proficient, you take a -4 penalty on attack rolls.