Ardent vow
paladin feature
Melee touch
Special: A character can use ardent vow a number of times per day equal to the character's Wisdom modifier or 1, whichever is higher. A character can use ardent vow no more than once per round.
Target: one creature
Effect: "The next time you attack the target before the end of your next turn, you gain a bonus to the damage roll equal to 5 + your Wisdom modifier. In addition, whenever you attack the target before the end of the encounter, it is subject to your divine sanction until the end of your next turn."[DP:82]
Ardent vow is a daily power granted to paladins who select it for the Lay on Hands class feature.
Paladins with the Lay on Hands class feature may choose to learn any one of lay on hands, ardent vow, or virtue's touch.