Wraith Strike

Briefly taking on an ethereal aspect, you teleport to an unoccupied space adjacent to a creature that you can see within the spell's range. Then as a part of the action used to cast this spell, you must make a melee attack against that creature, you have advantage on the attack. 

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the attack deals an extra 1d8 force damage for each slot level above 2nd.