The next time you hit a creature with a melee weapon attack during this spell's duration, your weapon pierces both body and mind, and the attack deals an extra 4d6 psychic damage to the target. The target must make a Wisdom saving throw. On a failed save, it has disadvantage on attack rolls and ability checks, and can't take reactions, until the end of its next turn.

(enter in keywords and delimit them by space, IE, "fire acid". Not all spells need keywords, limit keywords to effects/realm of spell)