Ruffian

Prerequisite: 4th level
You have turned kicking people that are down into an art form. You gain the following benefits:

• Ability Score Increase. Increase your Strength, Dexterity, or Constitution by 1, to a maximum of 20.
• Painful Critical. When you score a critical hit with a melee weapon attack against a creature, it must make a Constitution saving throw or become stunned until the start of your next turn. This does not affect undead, constructs, or other creatures that can feel no pain.

Dirty Strike - Active Ability (Special)

• When you make a melee weapon attack, you can follow up with a dirty trick (a knee to the gut, handful of sand to eyes, etc). The creature must make a Constitution saving throw. On failure, they become your choice of blinded or dazed (your choice) for 1 minute. A dazed creature moves at half speed, it can use either an action or a bonus action, but not both, and regardless of the creature’s abilities, it can’t make more than one attack during its turn.
• The target can repeat its saving throw at the end of each of their turns. A creature can spend their action treating their condition to automatically pass the saving throw. Once you use this against a target once, they are ready for subsequent attempts and automatically pass saving throws against it.

DC is 8 + your Strength or Dexterity modifier (your choice) + your proficiency bonus.

Once you use this feature to successfully blind or daze a creature, you cannot use it again until you complete a short or long rest.