Feat Effect: Effect: Duelist's Challenge

Granted by Duelist's Challenge

Any time you hit your dueling opponent using a single one-handed melee weapon while your other hand or hands are free, you gain a circumstance bonus to the Strike's damage equal to the number of damage dice your weapon deals.

If you attack a creature other than your dueling opponent, you take a circumstance penalty to damage equal to the number of damage dice your weapon deals.