alright, I'll put some crunch on it.

Mezmer is a masterwork enchanted dagger. Upon a succesfull attack, the user may as a free action, attempt to befuddle the mind of their target. This effect is a wisdom save at DC 18. Succesful save ends. Affected creatures gain disadvantage on all attack rolls. This enchantment cannot affect more than one creature at once. It can be used five times per 24 hours. If a target succesfully makes a save against the effect, they cannot be affected again for the next 24 hours.