Source: Compete Warrior
You can use larger than normal weapons with ease.
Prerequisite: Str 25, Epic Prowess, base attack bonus +21
Benefit: You can treat any weapon as if it were one size category smaller than normal for the purpose of wielding it in combat. For instance, a halfling with this feat could wield a longsword as a one-handed weapon, or a human could wield an ogre's Huge greatclub as a two-handed weapon.
Special: You can't use this feat in conjunction with Weapon Finesse. For instance, a halfling with this feat couldn't apply the effects of Weapon Finesse while wielding a short sword, even though this feat enables him to otherwise treat it as a light weapon.
Normal: You can wield weapons of your size or smaller only.