Siphon

You reach out towards a target living creature, stealing a portion of the life essence within their blood and transferring it into yours.

Make a ranged spell attack against the target. On a hit, they take 1d4 necrotic damage as you extract their essence. You regain hit points equal to the damage dealt.

At Higher Levels: This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).