Transfusion

When you cast this spell, you target two creatures within range, dealing damage to one and healing the other. The first target must make a Constitution saving throw. On a failed save it takes 2d10 necrotic damage, taking half damage on a successful save. The second target regains hit points equal to the necrotic damage that the first target took.

The first target can not be a Construct, Ooze, or Undead type creature. The second target can not be a Construct type creature.