Umbral Eruption

You strike the ground or the air, causing a localized burst of condensed shadow to explode from your position. Each creature of your choice within 5 feet of you must succeed on a Strength saving throw or take 1d6 force damage and be pushed up to 5 feet away from you.

The Void’s Weight: If the creature is in dim light or darkness, the damage increases to $1d10$ force damage as the surrounding shadows lend their mass to the blast.