Dark Transposition

You briefly turn into a flurry of ravens, dark mist or similar foreboding phenomena, before reappearing somewhere else. 
You teleport to an unoccupied space you can see within range. You create dark energy in a 10-foot wide line along the path you traveled. Creatures of your choice in the line must succeed on a Constitution saving throw or take 3d8 necrotic damage, or half as much on a successful save.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.

Credit to Jacob Sorensen in a YouTube comment I saw, with some personal wording tweaks included.