Expert Charioteer is an arena fighting style feat. It is available to martial classes with a Dexterity of 13. [Dr368:60]
It modifies the following feats:
- Careful attack (Ranger): If you are in a moving vehicle when you hit, you gain cover against the next attack that targets you until the end of your next turn.
- Commander's strike (Warlord): If you are in a moving vehicle, the ally can shift 1 square after the granted attack as a free action.
- Reaping strike (Fighter): If you in a moving vehicle when you hit, you gain a bonus to the damage roll equal to your dexterity modifier.