Powerful Charge( Eberron Campaign Setting, p. 57)
You can charge with extra force.
base attack bonus +1, Medium or larger size,
Greater Powerful charge (ECS) ,
When you charge, if your melee attack hits, you deal an extra 1d8 points of damage (if you are Medium size). For Large creatures, the extra damage is 2d6; for Huge, 3d6; for Gargantuan, 4d6; and for Colossal, 6d6. This feat only works when you make a charge. It does not work when you are mounted. If you have the ability to make multiple attacks after a charge, you may only apply this extra damage to one of those attacks.
A fi ghter may select Powerful Charge as one of his fi ghter bonus feats.