Anima Siphon

You attempt to absorb the animating force of a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 4d6 necrotic damage and must make a Constitution saving throw. On a failed save, the target ages by five years and the caster may choose to grow younger by a year.

When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.