Pugilist

A Pugilist is one of the most relentless of fighters, A pugilist smiles through an endless onslaught of attacks only to take their opponent out with a single strike, specialised in the kind of fighting that requires very little skill, and even less dexterity a Pugilist will never go down, at least not without taking an army with them.

Unbreakable Body

Beginning when you choose this archetype at 3rd level, When you take damage you may, as a reaction spend one Action surge to gain temporary hit points equal to the damage you would take plus your constitution modifier instead.

Pugilistic Fervor

Starting at 7th level, When hit with a critical attack, until the end of the attacker's next turn, you gain vulnerability to bludgeoning slashing, and piercing, additionally, after you are hit by a bludgeoning, slashing, or piercing attack you gain temporary hit points equal to double the damage you took.

Additionally, when you would be hit with an attack during this time period, you may spend an action surge to instead make an attack that deals half damage, but deals additional damage equal to the amount of damage you took.

Beyond Human

At 10th level, the first time you would fall beneath 0 hit points, you may spend an action surge to immediately take your turn, at the end of this turn you fall unconscious as normal and immediately fail one death saving throw. you regain this ability on a Short or Long rest.

Feral Pugilism

Starting at 15th level, Your weapon attacks score a critical hit on a 19--20, additionally when a weapon attack scores a critical hit you may immediately resolve an action surge without spending any surges.

Transcendent Physicality

At 18th level, you attain the pinnacle of resilience in battle. when below half health you have advantage on all attack rolls, additionally you are resistant to all damage types other than psychic.