Mounted Combat

Type: General, Fighter
Source: Player's Handbook

You are skilled in mounted combat.
Prerequisite: Ride 1 rank
Benefit: Once per round when your mount is hit in combat, you may make a Ride check to negate the hit. The hit is negated if your Ride check is greater than the attack roll (essentially, the Ride check becomes the mount's Armor Class if it is higher than the mount's regular AC).