Masters of the Blade. Most warriors fear to cross these deadly fighters in a duel.

Deadly strike

At third level. As an action, you unleash an unblockable lightning fast attack with your blade. The target needs to make a dexterity saving throw higher than 8 + proficiency + dexterity/strength modifier, on a failed save the target takes damage equal to all the attacks you can make that turn. (ex: if you can make 2 attacks with 1d8 + bonus each, you roll 2d8 + (2 x bonus)).

A sword without the heavy feature is required to make a death strike.

Improved critical

At 7th level your weapon attacks score a critical hit on a roll of 19–20 and if your target fails his dexterity save against your deadly strike with a dice roll of 1 or 2 you double the dice rolled for the attack.

Blade Mastery

At 10th level, When using a sword, you can use your bonus action to have advantage on your weapon attacks that turn. Your target must also roll death strike's saving throw with disadvantage for that turn.

The number of times you can do this equals your wisdom modifier (minimum of 1).

Additionally, when using death strike, you can choose to target all creatures in a 15 ft cube in front of you. If you use it this way, you dash forward while making the attack in a straight line 5 ft behind the area of the death strike triggering no opportunity attacks. (20 ft dash)

Superior Critical

At 15th level, your weapon attacks score a critical hit on a roll of 18–20 and if your target fails his dexterity save against your deadly strike with a dice roll of 3 or lower you double the dice rolled for the attack.

Bladestorm

At 18th level, you attain the pinnacle of blade mastery. You move and draw your blade so fast you can make multiple deadly slashes against ennemies around you before time can resume its pace. As an action you can choose to make a deadly strike against every creature of your choosing in a 30 foot radius around you.

You can do this 2 times per long rest.