Chaotic Vitality

You drain a target you can see within range of its life force. The target makes a CON saving throw. On a failed save, the target takes 2d6 necrotic damage. On a successive save, the target takes half as much damage and you cannot heal as a result. The total damage the target takes is the total number of hit points you can disperse for healing to yourself and allies within range.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.