Blood Thirst

Your hand becomes wreathed in necrotic energy and allows you to slip your hand into a creature's flesh and drain it of its energy. The target must succeed a Constitution saving throw or take 1d4 necrotic damage and you regain hit points equal to the necrotic damage dealt by this spell.

This spell has no effect on undead or constructs.

This spell's range increases to 30 ft. when you reach 5th level as long as you target a creature whose hit points are below its hit point maximum. Additionally the damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).