Counterspell (Variant)

You become aware of spellcasting activity in your vicinity and are able to react quickly to attempt to interrupt one such casting of your choosing.

While under the effect of this spell, you will instantly know when any creature attempts to cast a spell within 60 ft. of you. You will also know if the spell is a cantrip or not. If the spell being cast is one of your known spells or in your spellbook, you will know which spell is being cast. If the spell is on the spell list of one of your classes, you will know which class list it belongs to and its level, but not the name. Outside these conditions, you will not know anything else about the casting, and you will never know what level of spell slot is being used to cast it.

Once you learn about a casting, you can then decide to use a reaction to attempt to interrupt that casting. If the creature is casting a spell of 3rd level or lower, its spell fails and has no effect. 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 and has no effect. Whether you succeed or not at interrupting the casting, the Counterspell spell ends.

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.