Drayfn's Bane of Excellence

0-level (Cantrip) Necromancy

Casting Time: 1 action

Range/Area: 30 ft.

Components: V, S

Duration: 1 minute (concentration)

Attack/Save: CHA Save

A creature of your choice within range must make a Charisma saving throw. On a failed save, the next ability check, attack roll, or saving throw the target makes, within the duration, that results in a roll of 20 on a d20, is treated as a failure.

At higher levels:

The number of times this cantrip can turn a natural 20 into a failure increases by one when you reach 5th level (two natural 20s), 11th level (three natural 20s), and 17th level (four natural 20s).

Available for: Bard, Cleric, Sorcerer, Warlock, Wizard