Ragna Blade

"O, fragments of the Lord of Nightmares;
Free thine self from heaven's bonds.
Blade of cold, black nothingness;
Become one with my power, become one with my body.
Together, let us walk the path of destruction;
And shatter even the souls of the Gods.
Ragna Blade!"

.You manifest a black pulsating blade of primordial energy.
It has a greatsword's length, with a shortsword's weight, giving you Advantage on Dex saves.
You roll 1d10 of force, 1d10 of necrotic & 1d10 of piercing/slashing damage.

.You cross the distance using your walking speed in 1 action.
Not all targets might be on the same ground level as yours.
You can go downward or upward in a 6 ft/2 m height.

.Because the blade is special, you can also Slash across Space.
If a target will hide behind dimensional separations/walls, you will hit it anyway, as if physically present.
Banishing your target at the same time.