Umbral Needle

You flick a sliver of condensed shadow at a creature you can see within range. Make a ranged spell attack. On a hit, the target takes 1d6 psychic damage, and it can’t gain advantage on the next attack roll it makes before the end of its next turn.

At Higher Levels: Damage increases to 2d6 at 5th level, 3d6 at 11th, 4d6 at 17th.