Casting Time: 1 action
Range: 60 feet
Components: V, S
Duration: Concentration, up to 1 minute
Actually, as per this Ray of Enfeeblement the black beam of enervating energy can springs from from your finger towards a creature within a range. You can make a ranged spell attack which is against to the target. On a particular hit, the target could deals only half of the damage by the weapon attacks which can use the strength unless until the end of this spell.
At an end of each of the target turn, and it able to make a constitution saving throw which is against to the spell. On a particular success, the spell will end.
You can also check out crown of madness 5e spell
Spell Lists: Warlock, Wizard