Base Class: Fighter
For a lawless town a Vigilante can be as much a hero of the people as much as they could be a reason to stay home at night, as their bloody methods could terrify even the most hardened of criminals. they are known for speed and brutality.
Winner's Advantage
Beginning when you choose this archetype at 3rd level, your weapon attacks gain an extra d6 damage for every landed hit in a row, up to max of 2d6 at level 1.
Executioner's Haste
Starting at 7th level, when you reduce a creature to 0 Hit points with a melee weapon attack you can move up to half your speed and make another weapon attack on a different creature, this feature can be used multiple times in a round.
Low Profile
So long as you are wearing light armor you may Disengage as a bonus action. Additionally, you gain an extra 15 ft of movement
Devour Hope
Starting at 15th level, the first enemy you attack on your turn must make a Strength Saving Throw or take an extra 2d4 damage and be frightened by you. If the creature is unable to be frightened, they only take the extra damage.
Redeem
At 18th level, when you reduce a creature to 0 hit points you regain hit points equal to 1d6 + your Constitution modifier.