Essence drain

A black slimy beam of energy reachs from your finger toward a creature within range latching onto them if successfully hit. Make a ranged spell attack against the target. On a hit, the target suffers 1 point of exhaustion and deals half damage with any strength based attack for the duration.

At the end of each of the target's turns, it can make a Constitution saving throw against the spell. On a success, the damage halving ends but they keep the point of exhaustion. If the caster willingly drops the spell before the minute is finished then the affected creature does not keep the point of exhaustion.