Deterioration

A swarm of parasites springs from your palms toward a creature within range. Make a ranged spell attack against the target. On a hit, the strength of the target begins to fade, causing them to be sickly and weak. Damage with weapon attacks that use Strength become halved until the spell ends.

At the end of each of the target's turns, it can make a Constitution saving throw against the spell. On a success, the spell ends.