Carian's Retribution

You attempt to interrupt a creature in the process of casting a spell and redirect it. Make an ability check using your spellcasting ability. The DC equals 15 + the spell's level. On a success, the creature's spell turns back on itself, making the target creature the new target for their spell (or centering the area of effect on their square).

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the DC for this spell decreases by 1 for every spell level above 4th.