Challenge

You are accustomed to honorable combat, and have learned to ignore any distractions to a duel. At the start of your first turn in combat, you can choose a creature you can see as the target of a challenge. 

• You gain a bonus to damage dealt with your attacks against the target of your challenge equal to your proficiency modifier.
• You take a -2 penalty to your Armor Class except from attacks made by your target, as your attention is focused solely on them.

The challenge remains in effect until you or your target become dead or unconscious, or until the combat ends.