Dirty Fighter

The Dirty Fighter focuses on getting the upper hand by any means necessary. Honor means nothing to the Dirty Fighter when victory is on the line.

Pocket Sand

Beginning when you choose this archetype at 3rd level, you gain the ability to throw sand in the eyes of your enemy as a bonus action, temporarily blinding them. To use this ability, you must have an empty hand and the target must be within melee range. The target must succeed on a Dexterity saving throw or be Blinded until the end of your next turn. This has no effect on a creature with Blindsight.
You regain the ability to use Pocket Sand on a short or long rest.

Pocket Sand save DC = 8 + your proficiency bonus + your Charisma modifier.

Subterfuge Striker

If you do not have it, you gain proficiency and expertise in the Deception skill. You can make a deception check to trick or distract an opponent using half of your movement speed. The next attack on the affected target has advantage.

Spit

At 10th level, as an action you can spit on a creature within 5 feet of you. The target must succeed at a Wisdom saving throw or be compelled by your egregious act. For the duration, it has disadvantage on attack rolls against creatures other than you, and must make a Wisdom saving throw each time it attempts to move to a space that is more than 30 feet away from you; The target can make another saving throw at the end of their turn, ending the effects on a success.

Spit save DC = 8 + your proficiency bonus + your Charisma modifier.

Sucker Punch

Starting at 15th level, when you make an attack against a blinded opponent, you can add your charisma modifier to the damage. You can use this ability once per turn.

Twist the Knife

At 18th level, you gain the ability to exploit your enemy's weaknesses. Once per turn, when you hit with an attack with advantage, the attack will always be a critical hit.