Fighter Subclass: Dervish

The Dervish, often referred to as "The Blade Dancer" is a unique martial archetype that focuses on the hard to master martial training, combined with the grace of dancing, and becoming a tornado of steel, and death.

Enlightened Bond

At 3rd level, upon choosing this Martial Archetype, you gain the ability to spend 1 hour attuning to a weapon. While the weapon is attuned to you, you may choose to give it either the Light Property or the Finesse Property.

You may change the weapon to either property whenever you finish a short or long rest. You may be attuned to no more two weapons at any given time. Furthermore, the weapons do not count toward the number of items you can be attuned to.

Spinning Cut

If you are weilding a weapon with the light propert in your off-hand, as a bonus action, you may choose to make two attacks with that weapon.

Dance of Steel

At 7th level, whenever you take the attack action on your turn, until the start of your next turn, you gain a +2 to AC and you increase your movement speed by 10 feet. Any movement you use after taking the attack action does not provoke an attack of opportunity.

Tornado Slash

By 10th level, you know how to punish those that get to close to you. Whenever you take the attack action, you may instead to forgo your normal round of attacks, in exchange for making one attack against every hostile creature within 5 feet of you.

Whirlwind Onslaught

You have learned a way to push yourself beyond your current limits and becoming the living embodiment of flesh and steel.

By 15th level, you gain the ability to do a relentless onslaught of attacks to quickly break and carve foes apart. When you use this ability, double the number attacks you can take. After you have taken this action, you cannot use it agian until you finish a short or long rest. Additionally, you gain one level of exhaustion, and cannot take reactions until the start of your next turn.

Momentum Strikes

You become empowered with the ability to use your momentum to propell yourself foward.

At 18th level, whenever you take the attack action, you may use your movement action to close the distance between you and another creature, assuming you have not already used it.

If your movement allows you to get within 5 feet of the creature, you may immdeiately make another attack, You may then move to another a creature and make another attack, and so on. You must target a creature you have not attacked previously, and can only do this so long as you have not used all of your movement speed.

Credit: https://xocol4t4.cgsociety.org/8suv/blackguards-2-cassia