Greater Multiweapon Fighting

(Savage Species, page 35, DnD 3.0)

[Monster]

A creature with three or more arms can fight with a weapon in each hand. The creature can make up to three attacks per round with each extra weapon.

Prerequisite

Improved Multiweapon Fighting, Multiweapon Fighting, DEX 19, Base attack bonus +15, three arms, Multidexterity

Benefit

You may make up to three attacks with each offhand weapon that you wield, albeit with a -10 penalty on the third attack with each such weapon.

Special

This feat replaces the Greater Two-Weapon Fighting feat (originally presented in Masters of the Wild) for creatures with more than two arms.