Champion’s Challenge

Choose one hostile creature in the emanation that can see or hear you. For the duration, the target has disadvantage on attack rolls against creatures other than you, cannot benefit from advantage on attack rolls against you, and provokes opportunity attacks from you even if it Disengages. Once per turn when the target damages a creature other than you, you may make one weapon attack against it without using your reaction.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.