you create a wave of life stealing energy washing over foes and chilling them to the bone. Each creature in a 15-foot cone must make a con  saving throw. A creature takes 2d6 necrotic damage on a failed save and, be unable to regain hit points until the end of their next turn.on a successful save they take half damage and can still regain hit points.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.