1st-level necromancy

Casting Time: 1 action
Range: 30 feet
Components: V
Duration: Instantaneous

All creatures within 30 feet of you suffer 1d6+ your spellcasting ability modifier necrotic damage if they fail a Constitution saving throw or half on a successful save.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the healing increases by 1d6 for each slot level above 1st.

Thoughts?