Ray of Enfeeblement

2nd-Level Necromancy Spell (Warlock, Wizard)

Casting Time: Action
Range: 60 feet
Components: V, S
Duration: 1 minute

A beam of enervating energy shoots from you toward a creature within range. The target must make a Constitution saving throw. On a successful save, the target has

If you have Disadvantage on a D20 Test, roll two d20s and use the lower roll. A roll can't be affected by more than one Disadvantage, and Advantage and Disadvantage on the same roll cancel each other. See also D20 Tests.

on the next attack roll it makes until the start of your next turn.

On a failed save, the target has

If you have Disadvantage on a D20 Test, roll two d20s and use the lower roll. A roll can't be affected by more than one Disadvantage, and Advantage and Disadvantage on the same roll cancel each other. See also D20 Tests.

on Strength-based

D20 Tests encompass the three main d20 rolls of the game: ability checks, attack rolls, and saving throws. If something in the game affects D20 Tests, it affects all three of these rolls. The DM determines whether a D20 Test is warranted in a given circumstance. See also D20 Tests.

for the duration. During that time, it also subtracts 1d8 from all its damage rolls. The target repeats the save at the end of each of its turns, ending the spell on a success.

Source: Player's Handbook, p. 311