Exploit Weakness

Swashbuckler. Study one creature within range. For the duration, once per turn when you hit it with a weapon attack, add 3d8 damage and choose one: no reactions, speed reduced by 10 ft., disadvantage on next attack, or cannot benefit from half cover until your next turn.

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