Peltast

You have extensive training in the art of thrown weapons. You gain the following benefits:

• On a successful critical hit with a thrown weapon, the target is knocked back 15 feet. Creatures of a size huge or larger are unaffected.
• Your effective range with thrown weapons is doubled.
• Before you make an attack with a thrown weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.