The Endless Blade style is a fighting technique that teaches how to use the weight of one’s attacks to propel the body forward into a new attack. These special fighters fly through the battlefield, cutting down foes like fire through paper. 

Dancing Blade

Understudies of the Endless Blade style are said to move around the battlefield as though performing a graceful dance, and the flow of energies guides their bodies effortlessly from foe to foe. Starting a 3rd level, you gain proficiency in performance and have tremorsense out to 10 feet. 

Ebb and Flow

When you take up the Endless Blade style at 3rd level, you learn to attack in a fluid manner, moving continuously as you engage in battle. Whenever you hit a creature with a melee attack, if another creature is within 10 feet of you or the creature you hit, you may jump to that new creature and make an attack, automatically disengaging with the first creature.

This attack does not count against your attacks allowed per attack action, and moving to the new creature does not count against your movement per turn. You may use this ability a number of times equal to your Proficiency bonus per long rest. You can only use this feature twice per turn.

Flowing Edge

Starting at 7th level, the fluid movements of your attacking style let you swing your weapon in long, sweeping arcs. When you hit a creature with a melee weapon attack, you may deal your weapon damage to any number of additional creatures within 5 feet of you.

Build Momentum

Beginning at 10th level, you move with such dynamic aggression that you push you enemies back, gaining enormous advantage. When the pressure of all that momentum reaches a breaking point, you unleash a whirlwind of attacks. You now gain a stack of ‘Momentum’ whenever you successfully hit a creature, and lose one whenever you miss.

Landing a critical hit gains you two stacks, and a critical miss loses two. Whenever you reach ten stacks of Momentum, you deplete all stacks and gain two additional attacks during your attack action for that turn. These bonus attacks cannot grant you Momentum stacks.

Even if you somehow gain ten stacks of Momentum twice (or more) in one turn, you can only gain the benefit once per turn. 

Bladestorm

At 15th level, you are able to push your body beyond the breaking point, delivering endless attacks in a wild fury. At the beginning of your turn, you can activate Bladestorm and gain 30 feet of movement and unlimited attacks.

Each attack made beyond your normally allotted attacks per attack action has -3 to hit, and this penalty accumulates with each successive hit. The Bladestorm ends when you miss an attack. When a Bladestorm ends, you take 2 levels of exhaustion and fall prone. 

Steel Hurricane

Starting at 18th level, your onslaught of attacks has no limit, and you never seem to tire. You have mastered your technique, and every swing connects perfectly into the next.

Whenever you reduce a creature to zero or less hit points, you regain one use of your Action Surge and one use of your Ebb and Flow feature.