Tyrannical Whispers

You utter an enchanted phrase into the target's mind, hoping to sap their mental willpower. If the target can hear you, it must succeed on a Wisdom saving throw or take 1d8 psychic damage if it does not know the language of the invading phrase, or 1d4 psychic damage if it knows the language used for this spell, and they cannot communicate in any intelligible way until your next turn.

The spell’s damage increases by one die when you reach 5th level (2d8 or 2d4), 11th level (3d8 or 3d4), and 17th level (4d8 or 4d4).