Draining Touch

You touch a creature and drain their life essence. Make a melee spell attack. On a hit, the target takes 1d4 Necrotic damage, and must make a Constitution Saving Throw. On a failure, the target loses STR or DEX (caster's choice) equal to the damage rolled as long as concentration is maintained, or half as much on a successful save (minimum 1). This spell does not affect Undead or Constructs.