Lightning cutter samurai

You can control your breathing and move in such a way that you generate electricity which you can add to your attacks

Lightning cut

At 3rd level as an action you can imbue your sword with electricity and propel yourself 20 feet in a straight line

All creatures in that line take your weapon damage and take an extra 1d6 lightning damage (this increases to 1d8 at 10th level)

(the number of times you can use this is equal to twice your proficiency bonus and all expended uses recover after a sort or long rest)

Devastating cut

At 3rd level you know what week spots to look out for in almost every creature 19 and 20 count as critical hits (at level 10, 18 also counts as a critical hit)

 

Lightning cut 3 fold

At 7th level as an action you can propel yourself in 3 directions that equals to 30 feet

All creatures that you hit take the normal weapon damage and separate 1d6 lightning damage (this increases to 1d8 at 10th level) 

(the number of times you can use this is equal to your proficiency bonus and all expended uses recover after a sort or long rest)

Lightning never sleeps

At 10th level even under magical sleep you can still fight but devastating cut is no longer in affect

Ball of Lightning

At 15th level as an action you create a ball of lightning that is hurled at the appoint

The opponent makes a dex saving throw (dc 8+proficiency+dex modifier) the opponent takes 2d8 on a fail and 1/2 (rounded up) as much on a success (the number of times you can use this is equal to half your proficiency bonus and all expended uses recover after a long rest)

Perfected lightning cut

At 18th level you can propel your self in multiple directions that add up to 50 feet you can also move to a minimum of 10 feet and put the rest of the movement into slashing damage but only on a single target.

this attack does 4d12 lightning damage 

(You can use this 3 times per long rest)