Highblade

You liked of finding a way to crush your enemies with one hit. But you really like to see them being fools while you are upon them, ready to tear them a part. Because of that a new technique emerged from your sadim itself, new ways to get a path to stay beyond them watching and ready to strike. You like to make this "game" with all your enemies, since you probanilly just crushed a enemy, you use their dead body as a platform of jump to the next enemy and another and another, until you just hear the blood coming in your boots and just silence.

 

I will be your guillotine

By 3th level, you can make a diving melee attack on a creature 10 feet or more below you.This attack is taken at advantage and if hits, any fall damage that would be taken is instead applied as bonus damage to the target. If it miss, you take fall damage as normal. In order to apply fall damage, effects that would stop fall damage like feather fallor fly cannot be active on your character when making the attack. This attack can benefit from sneak attack. You can use this feat a number of times equal to your DEX modifier, minimum of 1 and you regain all uses on a short or long rest. Additionally, you gain proficiency in either the Acrobatics or Insight skill.

I want more

By the 9th level if you are able to reduce a creature to 0 hit points with "I will be your guillotine", you can jump on another creature to strike them. As a bonus action you can move up to 10 feet and make a melee weapon attack. But your bonus damages dice is half of the amount of "I will be your guillotine" dice. Ex: if your bonus damage is 3d6 when making a attack roll with advt, your bonus dmg become 1d6 in this feature.

Not today

By the 13th lvl, once for long rest, when you use your Uncanny Dodge against a melee weapon attack  that would reduce your hit points to 0, you can choose to take no damage instead and move up to 10 feet in any direction . Until the end of your next turn, all your attacks against that target have advantage.

Sorry ma friend but today is the day

By the 17th level, you learned how to use the enemy's body and your surroundings to your advantage. Whenever a creature misses you with a melee attack,  you can use your reaction to jump 1d4 x 10 feet, then make a melee attack from above expending one of your uses of "i will be your guillotine".