PVP Damage
From Aion PowerBook
PVP Damage is an offensive attribute and affects a character’s ability to inflict damage with physical and magical attacks in PVP.
Every 100 PVP Damage increases the damage of the skill by about 10% of the base value (the value with 0 Magical/Physical Damage and 100 Knowledge/Power) and reduced by the PVP multiplier which is ~52%.
Ex.) 
Body Smash's base damage with 0 Physical Damage is 642. In PVP, this skill will deal 52% of that value, which is around 333.
With 100 PVP Damage, you should see 33 increase in damage.
With 1,000 PVP Damage, the result will be around 666.
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