Brawler Specialist
Those fighters who choose to become Brawler Specialists train in unarmed, unarmored combat with a penchant for intensity. Brawler Specialists unleash savage beatdowns, undermining enemy morale and resilience with unrelenting force.
Unarmored Defense
Brawler Specialist: 3rd Level
While you are wearing no armor, your AC equals 10 + your Dexterity modifier + your Constitution modifier. You can use a shield and still gain this benefit.
Brawler's Might
Brawler Specialist: 3rd, 10th, and 18th Level
Your unarmed strike and natural weapon attacks gain the finesse property, and their damage die increases by one stage (1 > d4, d4 > d6, d6 > d8, d8 > d10, d10 > d12), and again at levels 10 (two stages) and 18 (three stages). You may choose for your attacks with improvised weapons use the same damage.
Additionally, you can use Dexterity instead of Strength whenever you would make a Strength (Athletics) check to grapple, shove, or trip a creature.
Pitiless Strikes
Brawler Specialist: 7th, 10th, 15, and 18th Level
Your unarmed strikes and natural weapon attacks count as enhanced for the purpose of overcoming resistance and immunity to unenhanced attacks and damage.
In addition, when you roll a critical hit with your unarmed strikes and natural weapon attacks, you can choose to impose a Constitution or Wisdom saving throw on the target, DC equal to 8 + your bonus to hit with your unarmed strike or natural weapon. On failure, the target is frightened (Wisdom) or weakened (Constitution) for up to 1 minute. It can reattempt the save at the beginning of its turns, ending the effect on success. You have advantage on attack rolls against creatures while they are frightened or weakened by this feature.
You can use this feature twice between long rests. You gain an additional use at levels 10 (3), 15 (4), and 18 (5).
Reflexive Offensive
Brawler Specialist: 10th Level
When you would use your reaction to make an attack with your unarmed strike or natural weapon and you are holding no other weapons, you can make a second attack with the same reaction without use of your proficiency.
Additionally, while you are unarmored, you may choose to gain any benefits you would normally have when wearing light, medium, or heavy armor (your choice). If you would have benefits from multiple armor types, you can change which type you use at the end of each long rest.
Evasion
Brawler Specialist: 15th Level
When you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on a saving throw, and only half damage if you fail.
Brutal Finisher
Brawler Specialist: 18th and 20th Level
Your finishing strikes are savage beyond compare. When you make an attack with your unarmed strike or natural weapon and roll a critical hit, you deal 2d10 additional damage of the same type. You also gain a number of charges each day equal to your proficiency bonus; you may choose to deal additional damage, expending 1-6 charges and dealing 2d10 additional damage per use expended. You regain these charges at the end of a short or long rest.
If any of the damage dice added from this feature roll at maximum, each hostile creature within 30 feet of you must make a Wisdom saving throw, DC equal to 8 + your bonus to hit with your unarmed strike or natural weapon. On failure, the creature is frightened until the beginning of your next turn. You have advantage on attack rolls against creatures frightened by this feature.
At 20th level, you can apply this damage to critical hits using any weapon with which you are proficient.