Astral devouring Blade

You evoke a black blade in your free hand. The blade is merely a hilt, until you use a spell slot, or you allow it to swallow. If you let go of the blade, it disappears, but you can evoke the blade again as a bonus action.

You can use your action to make a melee spell attack with the astral devouring blade. On a hit, the target takes 1d4 force damage. Unless it is a construction, then it takes an extra 6 slashing damage.

The astral blade sheds bright light in a 20-foot radius and dim light for an additional 10 feet (if you used a spell slot).

At Higher Levels. When you cast this spell using a spell slot of 1st level or higher, the damage increases by 1d4 for every one slot levels above cantrip.