Vox Arcana

You attempt to curse a creature you can see in the process of casting a spell.  If the triggering spell is of 2nd level or lower, the creature is cursed and the spell is Suppressed. If it is a spell of 3rd level or higher, make a performance check. The DC equals 12 + the triggering spell's level. On a success, the creature is cursed and the spell is Suppressed. While cursed the triggering spell is Suppressed until Lend Me Your Voice is triggered. The creature is unaware of the curse until it tries to cast the spell again. The creature is aware when the curse ends but does not automatically know who cursed them.

Suppressed: The creature cannot cast the triggering spell for 1d4 hours.

Lend Me Your Voice: You can cast the spell, using an appropriate spell slot level or higher, ending the curse on the target.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you automatically succeed the performance check if the level cast is equal or above the level of the triggering spell. The range of the spell increases by 10ft per level above 2nd.