Blood Siphon

You extend your arm and siphon life energy from one creature’s blood. The target must make a Constitution saving throw against your spell save DC to resist the effect. If the creature succeeds, the spell fails and nothing happens. If they fail, they take 1d6 necrotic damage and you restore half that many hit points (minimum of 1).

This spell has no effect on creatures that are not living or do not use blood to live.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).