Dark Secret

You learn the greatest weakness of the target. Until the end of your next turn, you have advantage on all ability checks, attack rolls, and saving throws involving your target or actions it has taken, and it has disadvantage on all ability checks, attack rolls, and saving throws involving you or actions you have taken.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can choose one additional target per spell slot level above 2nd.