Vampiric touch V S

The touch of your shadow-wreathed hand can
siphon life force from others to heal your wounds.
Make a melee spell attack against a creature within
your reach. On a hit, the target takes 3d6 necrotic
damage, and you regain hit points equal to half the
amount o f necrotic damage dealt. Until the spell
ends, you can make the attack again on each of your
turns as an action.
At Higher Levels. When you cast this spell using a
spell slot o f 4th level or higher, the damage increases by
1d6 for ea