Sentiment-de-fer

Starting at 3rd level, your skill with weaponry comes with great ease. You learn to strike with unmatched speed and weight. You gain the ability to make special attacks while using a one-handed melee weapon.

Follow through. Whenever you hit a creature with an attack from your attack action you may use your bonus action to make another attack using half of your proficiency bonus (minimum of +1).

Reckless abandon. Before you make an attack that does not already have disadvantage, you may declare to strike with reckless abandon. You make all melee weapon attack rolls until the end of this turn with disadvantage and when you deal damage you do not roll the weapon's damage die, instead you use the maximum die result instead.

En-garde

Starting at 3rd level, you gain the ability to parry and riposte as second nature. These maneuvers are fueled by your prowess points. You have a four prowess points. You regain all of your expended prowess points when you finish a long or short rest.

You gain another prowess point at 7th level and one more at 15th level.

Parry. When another creature makes a melee weapon attack against you while you are wielding a melee weapon, you can use your reaction and expend one prowess point to add your strength or dexterity modifier to your AC for that attack.

Riposte. After another creature makes a melee attack against you, you can use your reaction and expend one prowess point to make a melee weapon attack against that creature.

Pret

Starting at 7th level, you gain the ability to flow through combat to perform amazing feats. You gain additional ways to spend your prowess points as detailed below. This movement does not provoke opportunity attacks.

Counter-time. When an ally within 10 feet of you is hit by a melee attack you may use your reaction to expend a prowess point to move towards the attacker and make a melee attack roll against them.

Remise. When you make a melee attack roll and miss, you may use your reaction to expend a prowess point to instead reroll the attack roll against a different target within 5 feet of you.

Reposition. When an enemy's melee attack misses you, you may use your reaction to expend a prowess point to move up to your movement speed away. This movement does not provoke opportunity attacks.

Allez

Starting at 10th level, you are always ready for a fight and can push your body to the limit. You have advantage on initiative rolls.

Additionally, when you roll initiave and have no prowess points remaining, you regain 1 prowess point.

Point-in-line

Starting at 15th level, you may adapt your stance to fit the needs of combat. At the start of each of your turns, you may enter an aggressive or defensive base stance.

Aggressive. At the start of your turn, you may double your strength or dexterity modifier on the first attack made on your turn, but you subtract the chosen modifier from your AC against the first attack made against you.

Defensive. At the start of your turn, you may add your proficiency modifier to your AC, while this effect is in place you do not add your proficiency bonus to attack rolls.

Salute

Starting at 18th level, the rush of victory fuels you and allows you to flow from opponent to opponent with ease. When you deal the finishing blow to a target you gain 2 prowess point and a number of temporary hit points equal to fighter level + constitution modifier.