Better Vampiric Touch

The touch of your shadow-wreathed hand can siphon life force from others to heal your wounds. For the duration, your hands become a magical melee weapon that uses your spellcasting modifier for both attack and damage rolls. On a hit, your touch deals 3d6 necrotic damage, plus the modifier as usual with melee weapons, and you regain hit points equal to half the amount of necrotic damage dealt. Each subsequent attack on the same turn deals 1d6 less damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.