Thought Collapse

You unravel a creature's process of casting a spell. If the creature is casting a spell of 3rd level or lower, its spell fails, has no effect, and must make a Intelligence saving throw(8+ Prof. Bonus + Spellcasting ability) or lose two spell slots equal to or less than the countered spell on a failed save. If it is casting a spell of 4th 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, has no effect, and must make a Intelligence saving throw (8+ Prof. Bonus + Spellcasting ability) or lose two spell slots equal to or less than the countered spell on a failed save.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the interrupted spell has no effect if its level is less than or equal to the level of the spell slot you used. The countered spell caster then must make a Intelligence saving throw (8+ Prof. Bonus + Spellcasting ability) of the spell caster or lose two spell slots equal to or less than the countered spell on a failed save.