Bhavati Asvins

You attempt to interrupt a creature in the process of casting a spell. If the creature is casting a spell of 6th level or lower, its spell fails and has no effect. If it is casting a spell of 7th level or higher, make an ability check using your spellcasting ability. The DC equals 10 + the spell's level. On a success, the creature's spell fails and has no effect.

If the spell is successfully interrupted, it is also sealed, and the creature cannot cast that spell anymore. A remove curse or greater restoration spell cast on the target restores the creature's ability to cast that spell.

Only one spell can be sealed by a caster at a time, so if Bhavati Asvins is successfully cast again, the sealed spell is unsealed.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the spell is successfully interrupted if its level is less than or equal to the level of the spell slot you used.