Avasculate

You shoot a black ray of necromantic energy from your outstretched hand, causing your foe to violently purge blood or other vital fluids through his skin. Make a ranged attack roll against a target you can see within range. On a hit, the target is reduced to half it's current hit points, rounded down. A creature hit by this spell must make a Constitution saving throw or be stunned until the end of its next turn.