You attempt to interrupt a creature in the process of casting a spell. Make an Intelligence (Arcana) check with a DC of 15 + the spell’s level; you have advantage on the check if the spell is cast as a class spell and you are a member of that class. If you succeed on the Intelligence (Arcana) check, you identify the spell.

Make another ability check using your spellcasting ability + 4, contested by the target’s spellcasting ability or Intelligence (Arcana) check (the target chooses the ability to use) + the spell’s level. If you have identified the spell, you have advantage on the ability check. If you win the contest, the creature’s spell fails and has no effect.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, add 1 to your spellcasting ability check for each slot level above 3rd.