Stormblade

Yes, it is Yasuo wannabe

Level 3: Deadly wind

Your mastery of the blade is such, that opponents can't protect all of their bodies from your strikes. So fast and precise are your movements, that they envelop and penetrate the most dedicated defences set out against you.

While not holding a shield, and wearing armour no heavier, than medium, you attack rolls of 19+ count as critical strikes. Your critical strikes deal flat maximum weapon damage, without stats modifier.

This become 18+ at level 7, 17+ at level 15, 16+ at level 18. At level 20, damage modifier reduction no longer applies, and you deal full critical damage. 

Chaotic Vortex

Even the strongest opponents's attack will be hampered by unexpected blow of wind, that surrounds you. The wind itself steps in to protect you.

When hit, you can use your reaction to spend 1 charge of Flow to gain temporary hit points before damage is applied. This HP stays on for 3 rounds. (5 rounds at level 16)

You get 1 charges of Flow per Short rest at level 3, 3 charges at level 5, 4 charges at level 10, 5 charges at level 13, 6 charges at level 18

Sweeping blade

You become one of the wind. And strongest wind can cut no worse than steel.

After attacking enemy in your turn, you can sweep through that same target, dealing 1d6 + weapon modifier additional damage to them, and stopping within 15 feet behind them without inviting attack of opportunity. This costs you 5 feet of movement, you ignore difficult terrain, and have advantages on DEX saving throws until the start of your next turn.

To use Sweeping blade, you can't hold a shield, and your armour can't be heavier than Medium.

Damage becomes 1d6 at level 7, 2d4 at level 10, 1d10 at level 15, 2d8 at level 18.

Punishing Gust

When you attack an enemy, you can generate a strong wind as bonus action, originating at your position, and going in the direction of the target. 30 feet long, 5 feet wide.
Knocks everyone prone, if they fail STR save. 

Those who fail, take full attack damage from it, others only take half.

This costs you 1 point of Flow

Eye of the Storm

You become a hurricane of steel. 
For 1 Flow you automatically strike for weapon damage every enemy with 15 ft radius of you.

Summon the winds

Once per battle you can use an action to refill all your Flow charges.
You get 10 feet additional feet movement until the end of your next turn after using this ability